Given: Seven people H, I, J, K, L, M, and N attend workshops from Monday to Sunday

K’s workshop is on Wednesday

Only one person attends between K and M

J attends immediately after M

H attends before I but after N

L attends before J but not on Monday

So, H attends on Thursday

Hence, the correct answer is "Option 1".

Shortcut Trick

A runs 1200 m at 10 m/s ⇒ time = 120 s

B runs 900 m and finishes 30 s later ⇒ time = 150 s

Speed of B = 900 / 150 = 6 m/s

C runs 600 m and finishes 60 s later ⇒ time = 180 s

Speed of C = 600 / 180 = 3.3 m/s

∴ Answer: B = 6 m/s, C = 3.3 m/s

Alternate Method

Given:

Total race = 1200 m

A’s speed = 10 m/s

B headstart = 300 m ⇒ B runs 900 m

C headstart = 600 m ⇒ C runs 600 m

Calculation:

⇒ Time taken by A = 1200 / 10 = 120 s

⇒ B finishes 30 s after A

⇒ Time of B = 120 + 30 = 150 s

⇒ Speed of B = 900 / 150 = 6 m/s

⇒ C finishes 60 s after A

⇒ Time of C = 120 + 60 = 180 s

⇒ Speed of C = 600 / 180 = 3.33 ≈ 3.3 m/s

∴ Speeds are B = 6 m/s and C = 3.3 m/s.

Additional Information

Headstart Concept

Subtract headstart from total distance

Time Difference

Add delay to A’s time

Formula

Speed = Distance / Time

The correct answer is Kathak.

Key Points

• Kathak is the primary classical dance form of Northern India, specifically originating and flourishing in the state of Uttar Pradesh. The term Kathak is derived from the Sanskrit word 'Katha', which translates to 'story', and the practitioners of this art are called Kathakars (storytellers).
• Historically, this dance form was performed by nomadic bards in temples who narrated mythological stories from the Ramayana and Mahabharata using facial expressions and hand gestures. During the Bhakti Movement, it evolved to include the tales of Lord Krishna and Radha. Hence, the option Kathak is correct.
• Under the patronage of the Mughal Emperors and the Nawabs of Lucknow, Kathak transitioned from a temple ritual to a sophisticated court dance. This period introduced intricate footwork (Tatkar) and rapid spins (Chakkars), blending Persian and Indian cultural elements.
• The dance is characterized by the use of Ghungroos (metallic bells) tied around the ankles, which are used to produce complex rhythmic patterns. Unlike other classical dances, Kathak is performed with straight legs, focusing on the movement of the ankles and feet.
• There are three main Gharanas or schools of Kathak: the Lucknow Gharana (famed for grace and Abhinaya), the Jaipur Gharana (known for powerful Tandava and technical footwork), and the Banaras Gharana.

Additional Information

• Bharatnatyam: Originating from the state of Tamil Nadu, it is considered the oldest classical dance of India. It was traditionally known as Sadir and was performed by Devadasis in South Indian temples. Key features include the Alarippu, Jatiswaram, and Tillana. Hence, Bharatnatyam is from Tamil Nadu and not Uttar Pradesh.
• Odissi: This dance form belongs to the state of Odisha. It is known for the Tribhanga posture, where the body is bent at the neck, torso, and knees. It traces its roots to the Maharis (female temple servants) and was famously mentioned in the Natya Shastra. Hence, Odissi is from Odisha and not Uttar Pradesh.
• Manipuri: Hailing from the North-Eastern state of Manipur, this dance is deeply religious and revolves around the Raslila. It is distinctive for its Pung Cholom (drum dance) and the cylindrical costume (Kumil) worn by dancers. Hence, Manipuri is from Manipur and not Uttar Pradesh.
• Mohiniyattam: A feminine classical dance from Kerala, it is performed solo by women. The name literally means 'Dance of the Enchantress', referring to the Vishnu avatar Mohini. It is known for its graceful, swaying movements.
• Kuchipudi: This dance-drama originated in the village of Kuchipudi in Andhra Pradesh. It often involves a unique feature where the dancer performs while standing on the rim of a brass plate.

Important Points

• The Sangeet Natak Akademi, India’s national academy for music, dance, and drama, currently recognizes 8 classical dances of India. However, the Ministry of Culture also includes Chhau in the list, making it 9 classical dances.
• All Indian classical dances are rooted in the Natya Shastra, an ancient encyclopedic treatise on the performing arts written by Bharata Muni between 200 BCE and 200 CE.
• The legendary Pandit Birju Maharaj was the most prominent exponent of the Lucknow Kalka-Bindadin Gharana of Kathak and was awarded the Padma Vibhushan in 1986.
• In 2000, the Sattriya dance of Assam was the latest to be officially recognized as a classical dance form by the Sangeet Natak Akademi, having been introduced by the Vaishnava saint Mahapurush Sankaradeva in the 15^th Century.

Shortcut Trick

Loss 20% ⇒ SP = 80% of CP ⇒ CP₁ = 10000 / 0.8 = 12500

Profit 20% ⇒ SP = 120% of CP ⇒ CP₂ = 10000 / 1.2 = 8333.33

Total CP = 12500 + 8333.33 = 20833.33

Total SP = 20000

Loss = 833.33

Loss % = (833.33 / 20833.33) × 100 = 4%

∴ Answer = 4% Loss

Alternate Method

Given:

SP of each item = ₹10000

Loss on one = 20%, Profit on other = 20%

Formula used:

SP = CP × (1 ± percentage/100)

Calculation:

⇒ For loss item:

SP = 0.8 × CP ⇒ CP = 10000 / 0.8 = 12500

⇒ For profit item:

SP = 1.2 × CP ⇒ CP = 10000 / 1.2 = 8333.33

⇒ Total CP = 12500 + 8333.33 = 20833.33

⇒ Total SP = 20000

⇒ Loss = 20833.33 − 20000 = 833.33

⇒ Loss % = (833.33 / 20833.33) × 100 = 4%

∴ The correct answer is 4% loss.

Additional Information

Key Insight

Equal % gain and loss on same SP ⇒ always overall loss

Shortcut Formula

Net loss % = (x² / 100) when same SP ⇒ here = 20²/100 = 4%

Shortcut Trick

Total = (85×407 + 23×365 + 42×280)

= 34595 + 8395 + 11760 = 54750

Total members = 85 + 23 + 42 = 150

Average = 54750 ÷ 150 = 365

∴ Answer = 365

Alternate Method

Given:

Group A: 85 members, avg = 407

Group B: 23 members, avg = 365

Group C: 42 members, avg = 280

Formula used:

Overall average = (Σ (number × average)) ÷ total members

Calculation:

⇒ Total A = 85 × 407 = 34595

⇒ Total B = 23 × 365 = 8395

⇒ Total C = 42 × 280 = 11760

⇒ Total amount = 34595 + 8395 + 11760 = 54750

⇒ Total members = 150

⇒ Average = 54750 ÷ 150 = 365

∴ The correct answer is 365.

Additional Information

Weighted Average

Used when group sizes differ

Formula

Average = (Σ wx) ÷ Σ w

Shortcut Tip

Multiply first, then divide

Shortcut Trick

Let burgers = x, drinks = y

x + y = 87

15x + 5y = 785

Divide second eqn by 5:

3x + y = 157

Subtract:

(3x + y) − (x + y) = 157 − 87

2x = 70 ⇒ x = 35

y = 87 − 35 = 52

∴ Answer = 52 soft drinks

Alternate Method

Given:

Total items = 87, total money = ₹785

Let:

Burgers = x, Drinks = y

Equations:

x + y = 87 ...(1)

15x + 5y = 785 ...(2)

Calculation:

⇒ Divide (2) by 5:

3x + y = 157 ...(3)

⇒ Subtract (1) from (3):

2x = 70 ⇒ x = 35

⇒ Substitute in (1):

y = 87 − 35 = 52

∴ Number of soft drinks = 52.

Additional Information

Linear Equations

Used when two variables and two conditions are given

Elimination Method

Subtract equations to remove one variable quickly

Tip

Simplify coefficients first (divide by 5 here)

Shortcut Trick

√3025 = 55

⇒ 26 × 5 × 715 ÷ 55

715 ÷ 55 = 13

⇒ 26 × 5 × 13 = 1690

1690 = y + 913

⇒ y = 1690 − 913 = 777

∴ Answer = 777

Alternate Method

Given:

26 × 5 × 715 ÷ √3025 = y + 913

Calculation:

⇒ √3025 = 55

⇒ Substitute:

26 × 5 × 715 ÷ 55 = y + 913

⇒ Simplify:

715 ÷ 55 = 13

⇒ 26 × 5 × 13 = 1690

⇒ 1690 = y + 913

⇒ y = 1690 − 913 = 777

∴ The correct answer is 777.

Additional Information

Square Root Tip

3025 = 55²

Simplification Trick

Divide early to reduce calculations

Order of Operations

Follow multiplication and division left to right

The logic followed here is:

Given: F, G, H, I, U, V, and W are sitting around a circular table facing the centre

U sits second to the right of H

Only one person sits between U and W

Only one person sits between H and F

Only two people sit between V and W

Only one person sits between G and F

 

So, fourth to the right of I is G.

Hence, the correct answer is Option 3.

Shortcut Trick

Height splits base ⇒ 12/2 = 6

Use Pythagoras:

h = √(10² − 6²) = √(100 − 36) = √64 = 8

Area = (1/2) × base × height

= (1/2) × 12 × 8 = 48

∴ Answer = 48 cm²

Alternate Method

Given:

AB = AC = 10 cm, BC = 12 cm

Concept used:

In an isosceles triangle, altitude bisects the base

Calculation:

⇒ Half base = 12/2 = 6

⇒ Using Pythagoras:

h² = 10² − 6²

h² = 100 − 36 = 64

h = 8 cm

⇒ Area = (1/2) × base × height

⇒ = (1/2) × 12 × 8 = 48 cm²

∴ The correct answer is 48 cm².

Additional Information

Isosceles Property

Altitude divides base into two equal parts

Pythagoras Theorem

h² = hypotenuse² − base²

Area Formula

Area = (1/2) × base × height

The correct answer is It is redistributed.

Key Points

• In the phenomena of interference and diffraction, light energy is redistributed. This means that energy is simply moved from one place to another rather than being consumed or generated.
• According to the Law of Conservation of Energy, energy cannot be created or destroyed. In an interference pattern, the energy that disappears from the dark regions (destructive interference) reappears in the bright regions (constructive interference).
• In interference, the total energy in the superposition region is the sum of the energies of the individual waves. If we integrate the intensity over the entire fringe pattern, the average intensity remains the same as if the waves were not interfering. Hence, option D is correct.
• Light energy does not reduce or decrease in these processes. If it did, it would violate the principle of energy conservation. Hence, statements A and C are incorrect.
• Light energy does not increase because there is no external energy source adding to the system during the superposition of waves. Hence, statement B is incorrect.

Additional Information

• Interference of Light: This occurs when two coherent sources of light (sources with a constant phase difference) overlap. A famous example is Young’s Double Slit Experiment conducted in 1801.
• Constructive Interference: When waves meet in phase (crest to crest), the resultant amplitude is the sum of individual amplitudes, leading to maxima or bright fringes.
• Destructive Interference: When waves meet out of phase (crest to trough), the resultant amplitude is the difference between individual amplitudes, leading to minima or dark fringes.
• Diffraction of Light: This is the bending of light around the corners of an obstacle or an aperture. It is most prominent when the size of the obstacle is comparable to the wavelength of light.
• The diffraction pattern consists of a central bright fringe (central maximum) surrounded by alternating dark and bright fringes of decreasing intensity.
• Unlike interference, where all bright fringes are of equal intensity (in ideal conditions), in diffraction, the energy is spread such that the central maximum carries the most energy.
• Intensity and Amplitude: The intensity (I) of light is directly proportional to the square of the amplitude (A). Mathematically, I ∝ A². During redistribution, the variations in amplitude across space create the visible pattern.

Important Points

• Mathematical Proof of Energy Conservation: For two waves with intensities I1 and I2, the resulting intensity at any point is I = I1 + I2 + 2√(I1I2) cosφ. When averaged over a full cycle of the phase difference φ, the interference term (2√(I1I2) cosφ) becomes zero, making the average intensity I1 + I2.
• Coherence: For a stable redistribution of energy (a steady interference pattern), the light sources must be coherent. Non-coherent sources (like two independent light bulbs) do not show visible redistribution because the phase difference changes too rapidly for the human eye to detect.
• Applications: The redistribution of light energy is utilized in anti-reflective coatings on camera lenses, holography, spectrometers, and interferometers (like the Michelson Interferometer) used to measure small distances or the speed of light.
• Wave Nature: Both interference and diffraction serve as definitive evidence for the wave theory of light, as proposed by Thomas Young and Augustin-Jean Fresnel in the early 19^th century.

Given Statements:

All grapes are lemons.

No grape is a melon.

No melon is a strawberry.

The least possible Venn diagram for the given statements is:

Conclusions:

I. No lemon is a melon – False

(Because only grapes are restricted from melons; since lemons are a larger category, they can still overlap with melons in the area outside of the grape circle.)

II. No grape is a strawberry – False

(While grapes cannot be melons and melons cannot be strawberries, there is no direct restriction between grapes and strawberries; they could still overlap or be separate.)

So, neither conclusion I nor II follows.

Hence, the correct answer is Option (1).

Given Statements:

I. V is shorter than N but taller than T. M is taller than T.

II. L is taller than only one tree.

Analysis:

Statement I alone → Not sufficient

N > V > T and M > T

We can not determine the shortest tree.

Statement II alone → Not sufficient

_> _ > _ > L > _

Now, combining I and II:

Possible combination:

(1). N > V > M > L > T

(2). M > N > V > L > T

After combining both statements, we can conclude that 'T' is the shortest tree.

Hence, the correct answer is Option (1).

Given: E, F, G, W, X and Y live on six different floors of the same building.

The lowermost floor in the building is numbered 1, the floor above it is numbered 2 and so on till the topmost floor is numbered 6.

F lives immediately above G

Only two people live between E and G

E lives on an odd-numbered floor

Y lives immediately below W

 

Now, people between X and W: 2 people

Hence, the correct answer is Option 1.

Given:

‘KITE’ is coded as ‘5871’

‘TIME’ is coded as ‘7853’

So, M = 3

Hence, the correct answer is Option 2.

The logic followed here is:

Given numbers: 235, 879, 584, 635, 159

Logic: Find the highest and lowest numbers, then perform the required operation.

Arranging in descending order: 879, 635, 584, 235, 159

Highest number = 879

→ Third digit = 9

Lowest number = 159

→ Second digit = 5

Result = 9 + 5 = 14

Hence, the correct answer is Option 3.

The correct answer is Expand social insurance to informal sector.

Key Points

• Expanding social insurance to the informal sector serves as a dual-purpose mechanism that provides a safety net while incentivizing the transition to the formal economy. By offering benefits like pension and health insurance, the government encourages informal workers to register, thereby initiating employment formalization. Hence, Statement A is correct.
• Universal Basic Income (UBI) provides a flat cash transfer to all citizens regardless of employment status. While it is highly effective for poverty alleviation, it does not inherently provide a mechanism for formalization or link workers to the labor market structures. Hence, Statement B is incorrect.
• Deregulating labor laws is often intended to make hiring easier and reduce the cost of compliance for employers. However, in a country with already low social protection coverage, this often leads to further precarity and reduced job security, failing the social protection goal. Hence, Statement C is incorrect.
• Targeted food subsidies, such as those under the National Food Security Act (NFSA) 2013 in India, are vital for nutrition and poverty relief but have no direct impact on employment formalization or bringing workers into the tax or social insurance net. Hence, Statement D is incorrect.
• The formalization process is crucial because the informal sector accounts for nearly 90% of the workforce in developing nations like India, where workers lack legal contracts and maternity benefits.

Additional Information

• Pradhan Mantri Shram Yogi Maan-Dhan (PM-SYM): Launched in March 2019, this is a voluntary and contributory pension scheme specifically for unorganized workers. It targets individuals with a monthly income of Rs. 15,000 or less in the age group of 18 to 40 years. It ensures a minimum assured pension of Rs. 3,000 per month after the age of 60 years.
• The e-Shram Portal: Developed by the Ministry of Labour & Employment in August 2021, this is the first-ever national database of unorganized workers including migrant workers, construction workers, and gig workers. It facilitates the delivery of social security schemes and tracks employment trends.
• ILO Recommendation No. 204: This is a landmark international standard adopted by the International Labour Organization (ILO) in 2015. It provides a guideline for member states to facilitate the transition from the informal to the formal economy while ensuring decent work and worker rights.
• Social Security Code, 2020: In India, this act aims to universalize social security for both organized and unorganized sectors. It seeks to consolidate nine previous labor laws and introduces provisions for gig workers and platform workers for the first time in Indian legal history.

Important Points

• The Missing Middle: This term refers to a large segment of the population that is neither poor enough to qualify for subsidized social assistance (like BPL cards) nor wealthy enough to afford private insurance or be covered by employer-based schemes.
• Economic Impact: Formalization increases the tax base of a country, allowing for higher public investment in infrastructure and education. Informal employment often leads to low productivity and lack of access to credit from formal financial institutions.
• Gender Perspective: A high percentage of women are engaged in the informal sector, particularly in domestic work and agriculture. Expanding social insurance provides them with maternity benefits and old-age security, which are often absent in informal arrangements.
• Administrative Challenges: One of the main features of expanding insurance is the need for digital literacy and biometric identification (like Aadhaar in India) to prevent leakages and ensure direct benefit transfer (DBT).

Shortcut Trick

Let Marked Price (MP) = 130

SP₁ = (4/13) × 130 = 40

Loss 30% ⇒ SP₁ = 70% of CP

⇒ CP = 40 / 0.7 = 400/7

SP₂ = 60% of MP = 0.6 × 130 = 78

Profit = 78 − (400/7) = 146/7

Profit % = [(146/7) ÷ (400/7)] × 100

= (146 / 400) × 100 = 36.5%

∴ Answer = 36.5%

Alternate Method

Given:

Selling at (4/13) of MP gives 30% loss

Selling at 60% of MP → find profit %

Formula used:

SP = CP × (1 − loss/100), Profit % = (Profit/CP) × 100

Calculation:

⇒ Let MP = 130

⇒ First SP = (4/13) × 130 = 40

⇒ 40 = 70% of CP ⇒ 40 = 0.7CP

⇒ CP = 400/7

⇒ Second SP = 60% of 130 = 78

⇒ Profit = 78 − 400/7 = 146/7

⇒ Profit % = (146/7 ÷ 400/7) × 100

⇒ = (146/400) × 100 = 36.5%

∴ The correct answer is 36.5%.

Additional Information

LCM Trick

Take MP as multiple of denominator (13)

Loss Relation

SP = 70% of CP for 30% loss

Key Insight

Find CP first, then compute new profit

The correct answer is Moving the mouse.

Key Points

• Sleep Mode in Windows is a power-saving state that allows a computer to quickly resume full-power operation (typically within 2 to 5 seconds) when a user wants to start working again. In this state, the current session and open applications are kept in the Random Access Memory (RAM) while other components like the hard drive and monitor are powered down.
• Moving the mouse or clicking a mouse button is one of the most common interrupt triggers that sends a signal to the CPU to exit the low-power state. This action tells the Operating System to restore power to the peripheral devices and the display. Hence, option A is correct.
• Network time sync is a background synchronization process using the Network Time Protocol (NTP). While it ensures the system clock is accurate, it is a passive process that occurs while the system is already awake or in a Modern Standby mode; it does not typically "wake" a traditional sleeping PC for the user. Hence, option B is incorrect.
• A BIOS update (Basic Input/Output System) is a critical low-level firmware procedure that requires the computer to be fully active or in the middle of a reboot cycle. A computer cannot perform a firmware update while it is in Sleep mode, as the processor is not executing standard instruction sets during that time. Hence, option C is incorrect.
• If a battery is fully drained while a laptop is in sleep mode, the system does not become "active." Instead, Windows typically triggers a critical battery alarm and automatically moves the data from RAM to the Hard Drive/SSD (entering Hibernation) or simply shuts down to prevent hardware damage. Hence, option D is incorrect.

Additional Information

• Advanced Configuration and Power Interface (ACPI): This is an open industry standard that Windows uses for power management. The "Sleep" state is technically known as the S3 state. In this state, the PSU (Power Supply Unit) stops providing power to most components except for the RAM, which must remain powered to retain the system's current data.
• Sleep vs. Hibernation: While Sleep (S3) keeps data in the volatile RAM for a near-instant wake, Hibernation (S4) saves the data to the non-volatile Hard Disk. Hibernation uses zero power and is common in laptops to save battery life over long periods of inactivity, whereas Sleep is preferred for short breaks.
• Wake-on-LAN (WOL): This is a networking feature that allows a computer to be turned on or awakened by a network message (called a Magic Packet). This is widely used by IT administrators in large organizations to perform maintenance on computers remotely during night hours.
• Device Manager Settings: Users can customize which devices wake the computer. Under Device Manager, by selecting the Properties of a Keyboard or HID-compliant mouse, one can check or uncheck the option "Allow this device to wake the computer". This is useful for preventing accidental wakes by pets or vibrations.
• Hybrid Sleep: This feature, primarily designed for desktop computers, combines Sleep and Hibernation. It puts open documents and programs in RAM and on the hard disk. If a power failure occurs, Windows can restore your work from the hard disk; if power remains, the system wakes instantly from RAM.

Important Points

• Modern Standby (S0 Low Power Idle): Introduced with Windows 10, this allows the PC to stay connected to the Internet while in a low-power state, similar to a smartphone. This enables functions like Cortana or Email syncing to happen in the background, though moving the mouse remains the standard user-initiated wake action.
• Power Consumption: Sleep mode typically consumes about 1 to 5 watts of power, whereas a fully active PC can consume anywhere from 60 to 500 watts depending on the hardware and load.

The logic followed here is based on the alphabetical position pattern:

Option 1: PQ → ST

Option 2: FG → IJ

Option 3: MN → QR

Option 4: CD → FG

Thus, MN–QR does not follow the pattern.

Hence, the odd one out is Option 3.

The correct answer is A framework for environmental accountability.

Key Points

• The Environment Audit Rules, 2025, are designed to streamline the process of monitoring industrial impact on the ecosystem by establishing a formal framework for environmental accountability. This initiative ensures that both public and private sector entities are held responsible for their carbon footprint and resource consumption.
• These rules were formulated under the Ministry of Environment, Forest and Climate Change (MoEFCC) to update the existing Environmental Audit mechanisms that have been in place since the 1990s. The 2025 version introduces more stringent reporting standards and mandatory third-party verifications.
• The primary function of these rules is to mandate that industries provide an annual Environmental Statement for each financial year ending on the 31^st of March. This document must detail water consumption, raw material usage, and pollutant discharge levels.
• The application of these rules extends to all "red" and "orange" category industries as classified by the Central Pollution Control Board (CPCB), aiming to integrate sustainable development goals into the core business operations of Indian enterprises.

Additional Information

• Environment Protection Act, 1986:
• The Environment Audit Rules derive their legal authority from Section 6 and Section 25 of the Environment Protection Act, 1986. This Act serves as the umbrella legislation for environmental regulation and protection in India.
• Business Responsibility and Sustainability Reporting (BRSR):
• The 2025 framework is closely aligned with the BRSR norms introduced by the Securities and Exchange Board of India (SEBI). While BRSR focuses on top 1000 listed companies, the Environment Audit Rules target a broader range of manufacturing and processing units based on their pollution potential.
• Role of the National Green Tribunal (NGT):
• The NGT, established in 2010, plays a crucial role in adjudicating disputes arising from audit failures. Non-compliance with the 2025 Rules can lead to heavy penalties or the closure of industrial units as per NGT directives.
• Comparison with Global Standards:
• The Indian framework incorporates elements from the ISO 14001 (Environmental Management Systems) but remains statutory rather than voluntary. It emphasizes data-driven governance to meet international commitments such as the Paris Agreement and COP26 goals.

Important Points

• Audit Components: The audit process includes energy audits, waste management audits, and occupational health and safety assessments. Entities must report numerical values for effluent treatment plant (ETP) efficiency and air emission levels.
• Certification: The rules specify that audits must be performed by Environmental Auditors registered with the Quality Council of India (QCI) or the National Accreditation Board for Education and Training (NABET).
• Digital Integration: A significant feature of the 2025 rules is the transition to a paperless reporting system. All Environmental Statements must be uploaded to the Parivesh Portal, a Single-Window Integrated Environmental Management System.
• Year of Implementation: While the rules are titled for 2025, the transition period for existing industries usually spans 6 to 12 months, making 2026 the first full compliance year for data submission.

The correct answer is Ganga.

Key Points

• Ganga: It is a Himalayan river that originates from the Gangotri Glacier near Gaumukh in the Uttarkashi district of Uttarakhand. It is not part of the peninsular river system. Hence, this option is the correct answer.
• Narmada: It is a major peninsular river that flows westwards through a rift valley between the Vindhya and Satpura ranges. Hence, this statement is incorrect as it is a peninsular river.
• Krishna: It is the second-largest east-flowing peninsular river, originating near Mahabaleshwar in Maharashtra. Hence, this statement is incorrect as it is a peninsular river.
• Godavari: It is the largest peninsular river system in India, often referred to as the Dakshin Ganga. Hence, this statement is incorrect as it is a peninsular river.
• The Ganga river basin is the largest in India, covering about 8.6 lakh sq. km and flowing through India and Bangladesh for a total length of 2,525 km.

Additional Information

• The Ganga River System:
• The river is formed by the confluence of the Alaknanda and Bhagirathi at Devprayag.
• It enters the plains at Haridwar and receives several tributaries like the Yamuna, Ghaghara, Gandak, and Kosi.
• The Yamuna, its largest tributary, originates from the Yamunotri Glacier and meets the Ganga at Prayagraj (Allahabad).
• The river eventually empties into the Bay of Bengal, forming the Sundarbans Delta, the largest delta in the world, along with the Brahmaputra.
• The Peninsular River System:
• These rivers are much older than the Himalayan rivers and are mostly non-perennial or seasonal, as their flow is dependent on rainfall.
• The main water divide in Peninsular India is formed by the Western Ghats, which run from north to south close to the western coast.
• Major east-flowing rivers include the Mahanadi, Godavari, Krishna, and Cauvery, which drain into the Bay of Bengal and form deltas.
• Major west-flowing rivers are the Narmada and Tapi, which flow through rift valleys and form estuaries instead of deltas.

Important Points

• Comparison of River Types:
• Himalayan Rivers: These include the Indus, Ganga, and Brahmaputra. They are perennial (flow year-round) because they receive water from glaciers and monsoon rainfall. They have long courses and perform intensive erosional activity.
• Peninsular Rivers: These are seasonal and have shorter and shallower courses compared to their Himalayan counterparts. Their flow is significantly reduced during the dry season.
• Specific Statistics:
• The Godavari has a length of 1,465 km and its basin covers parts of Maharashtra, Madhya Pradesh, Chhattisgarh, Odisha, and Andhra Pradesh.
• The Narmada travels a distance of about 1,312 km before reaching the Gulf of Khambhat.
• The Krishna river flows for 1,400 km and is vital for irrigation in South India.

Shortcut Trick

Mean Proportional (MP) of a and b = √(a × b)

MP = √(18 × 128)

MP = √(2 × 9 × 2 × 64) = √(4 × 9 × 64)

MP = 2 × 3 × 8 = 48

∴ The correct answer is 48.

Alternate Method

Given: First number (a) = 18, Second number (b) = 128

Formula: Let the mean proportional be x. Then a : x :: x : b

18 : x :: x : 128 Product of Extremes = Product of Means x² = 18 × 128

⇒ x / 18 = 128 / x

⇒ x² = 18 × 128

⇒ x² = 2304

⇒ x = √2304

⇒ x = 48

∴ The correct answer is 48.

Additional Information

Third Proportional

For two numbers a and b, the third proportional c is defined by the relation a : b = b : c, which gives c = b² ÷ a.

Fourth Proportional

For three numbers a, b, and c, the fourth proportional d is defined by a : b = c : d, which gives d = (b × c) ÷ a.

Continued Proportion

Three quantities a, b, c are said to be in continued proportion if a : b = b : c, where b is the mean proportional.

Shortcut Trick

LCM(A, B, C) = 1080 = 2³ × 3³ × 5.

Since HCF(A, B) = 12, HCF(B, C) = 18, and HCF(A, C) = 6, the prime factors must be distributed such that x, y, and z are pairwise coprime.

Testing x = 2, y = 3, z = 5 (all pairwise coprime):

A = 12 × 2 = 24, B = 36 × 3 = 108, C = 18 × 5 = 90.

Check: LCM(24, 108, 90) = 1080 and HCFs are correct. Sum = 24 + 108 + 90 = 222.

∴ The correct answer is 222.

Alternate Method

Given:

A = 12x, B = 36y, C = 18z

HCF(A, B) = 12, HCF(B, C) = 18, HCF(A, C) = 6

LCM(A, B, C) = 1080 = 2³ × 3³ × 5

Formula used: LCM of numbers is the product of the highest powers of all prime factors involved.

A = 12 × x B = 36 × y C = 18 × z LCM Factor 2³ LCM Factor 3³ LCM Factor 5 Min Sum A+B+C = 222

Prime factorization of constants:

A = 2² × 3¹ × x

B = 2² × 3² × y

C = 2¹ × 3² × z

To satisfy LCM = 2³ × 3³ × 5¹:

⇒ max(2, 2, 1, v₂(x), v₂(y), v₂(z)) = 3

⇒ max(1, 2, 2, v₃(x), v₃(y), v₃(z)) = 3

⇒ max(v₅(x), v₅(y), v₅(z)) = 1

Using the pairwise coprime condition and HCF constraints:

⇒ For v₂ = 3, we can set x = 2 (since A already has 2², 12 × 2 = 24 has 2³).

⇒ For v₃ = 3, we can set y = 3 (since B already has 3², 36 × 3 = 108 has 3³).

⇒ For v₅ = 1, we can set z = 5 (since C is 18 × 5 = 90).

⇒ (x, y, z) = (2, 3, 5) are pairwise coprime.

⇒ A = 12 × 2 = 24

⇒ B = 36 × 3 = 108

⇒ C = 18 × 5 = 90

⇒ A + B + C = 24 + 108 + 90 = 222.

∴ The correct answer is 222.

Additional Information

LCM and HCF Relationship

For any three numbers A, B, and C, LCM(A, B, C) × HCF(A, B) × HCF(B, C) × HCF(A, C) is not necessarily equal to A × B × C × HCF(A, B, C), unlike the case for two numbers.

Pairwise Coprime Integers

A set of integers is pairwise coprime if the HCF of every possible pair in the set is 1. If HCF(x, y) = 1, HCF(y, z) = 1, and HCF(x, z) = 1, then LCM(x, y, z) = x × y × z.

Prime Power in LCM

The exponent of a prime p in the LCM of a set of numbers is the maximum of the exponents of p in the prime factorizations of those numbers.

The logic followed here is:

So, 'HFG 10' will replace the question mark in the given series.

Hence, the correct answer is "Option 1"

The correct answer is Chittaranjan Das.

Key Points

• The Congress-Khilafat Swarajya Party, commonly known as the Swaraj Party, was formed on January 1, 1923.
• The party was established following the Gaya Session of the Indian National Congress held in December 1922, where a conflict arose between the "Pro-Changers" and the "No-Changers."
• Chittaranjan Das, also known as Deshbandhu, served as the President of the newly formed party, while Motilal Nehru took the role of one of its Secretaries.
• The primary objective of the party was to contest elections for the Legislative Councils established under the Government of India Act 1919 and to "wreck the reforms from within" by obstructing official business.
• This move was a response to the suspension of the Non-Cooperation Movement by Mahatma Gandhi in February 1922 following the Chauri Chaura incident.

Additional Information

• Chittaranjan Das (1870–1925):
• He was a distinguished lawyer from Bengal who famously defended Aurobindo Ghosh in the Alipore Bomb Case of 1908.
• He was known for his selfless service and was given the title Deshbandhu (Friend of the Nation).
• He was elected as the President of the Ahmedabad Session of Congress in 1921, though he was in jail at the time.
• Motilal Nehru (1861–1931):
• A prominent lawyer and politician from Allahabad, he served as the President of the Indian National Congress twice, in 1919 (Amritsar) and 1928 (Calcutta).
• He was the father of Jawaharlal Nehru and the author of the Nehru Report (1928), which was the first major attempt by Indians to draft a constitution.
• Hakim Ajmal Khan:
• He was another prominent co-founder of the Swaraj Party and a key figure in the Khilafat Movement.
• He served as the President of the Congress in 1921 as a substitute for C.R. Das.
• Belgaum Session (1924):
• To avoid a split in the Congress similar to the Surat Split of 1907, Mahatma Gandhi reached a compromise with the Swarajists.
• The Swaraj Party was allowed to work within the Congress as its integral part, focusing on council entry.

Important Points

• Pro-Changers vs. No-Changers:
• Pro-Changers: Leaders like C.R. Das, Motilal Nehru, and Vithalbhai Patel who advocated for ending the boycott of legislative councils.
• No-Changers: Leaders like C. Rajagopalachari, Vallabhbhai Patel, and Rajendra Prasad who wanted to stick to Gandhian methods of constructive work outside the government.
• Performance in 1923 Elections:
• The Swaraj Party performed remarkably well in the November 1923 elections, winning 42 out of 101 elected seats in the Central Legislative Assembly.
• In 1925, Vithalbhai Patel became the first Indian Speaker (President) of the Central Legislative Assembly, marking a significant victory for the party.
• Decline of the Party:
• The party suffered a major setback following the sudden death of Chittaranjan Das in June 1925.
• Internal divisions between the "Responsivists" and "Non-responsivists" further weakened the party's influence by the late 1920s.

Shortcut Trick

Equation: 6x² + x − 2 = 0

Factorize: (3x + 2)(2x − 1) = 0

Roots: x = -2/3, 1/2

b > a ⇒ a = -2/3, b = 1/2

2a + 3b = 2(-2/3) + 3(1/2)

= -4/3 + 3/2 = (-8 + 9)/6 = 1/6

∴ Answer = 1/6

Alternate Method

Given:

6x² + x − 2 = 0

Formula used:

Quadratic formula: x = [-b ± √(b² − 4ac)] / 2a

Calculation:

⇒ a = 6, b = 1, c = −2

⇒ Discriminant = 1 + 48 = 49

⇒ Roots = [-1 ± 7] / 12

⇒ x = (6/12) = 1/2, x = (-8/12) = -2/3

⇒ a = -2/3, b = 1/2

⇒ 2a + 3b = 2(-2/3) + 3(1/2)

⇒ = -4/3 + 3/2 = 1/6

∴ The correct answer is 1/6.

Additional Information

Root Identification

Assign smaller root to a and larger to b

Factorization Tip

Split middle term for quick solving

Accuracy

Convert to common denominator carefully

Shortcut Trick

CSA = πrl

r ↑ 8% ⇒ ×1.08

l ↓ 15% ⇒ ×0.85

New CSA factor = 1.08 × 0.85 = 0.918

Change = (0.918 − 1) × 100 = −8.2%

∴ Answer = 8.2% decrease

Alternate Method

Given:

Radius increases by 8%, slant height decreases by 15%

Formula used:

Curved Surface Area (CSA) = πrl

Calculation:

⇒ Let original CSA = πrl

⇒ New radius = 1.08r

⇒ New slant height = 0.85l

⇒ New CSA = π × (1.08r) × (0.85l)

⇒ = 0.918 × πrl

⇒ Percentage change = (0.918 − 1) × 100

⇒ = −8.2%

∴ The correct answer is 8.2% decrease.

Additional Information

Product Rule

If two quantities change, multiply their factors

Quick Method

(1 + a)(1 − b) − 1

Tip

Convert % to decimals before multiplying

Shortcut Trick

Let CP per article = 100

Total CP for 123 articles = 12300

Profit = 28% ⇒ Total SP = 12300 × 1.28 = 15744

Customer pays for 120 articles after 20% discount

⇒ SP per article = 15744 ÷ 120 = 131.2

Marked Price (MP) per article = 131.2 ÷ 0.8 = 164

Increase over CP = 164 − 100 = 64%

∴ Answer = 64%

Alternate Method

Given:

20% discount, 3 free on 120, profit = 28%

Assume:

CP per article = 100

Calculation:

⇒ Total articles given = 120 + 3 = 123

⇒ Total CP = 123 × 100 = 12300

⇒ Profit = 28%

⇒ Total SP = 12300 × 1.28 = 15744

⇒ Customer pays for 120 articles

⇒ Effective SP per article = 15744 ÷ 120 = 131.2

⇒ After 20% discount:

SP = 0.8 × MP

⇒ MP = 131.2 ÷ 0.8 = 164

⇒ CP = 100

⇒ Increase = (164 − 100)% = 64%

∴ The marked price exceeds cost price by 64%.

Additional Information

Free Item Trick

Include free items in cost, not in selling count

Discount Relation

SP = MP × (1 − discount)

Strategy

Assume CP = 100 for easy calculation

Family Chart:

Given: C is the son of F, F is the sister of E, E is the son of G, G is the husband of H.

 

Thus, C is daughter’s son of H.

Hence, the correct answer is Option 4.

The correct answer is Rise of smaller kingdoms under hereditary rulers.

Key Points

• The decline of the Gupta Empire around 550 CE marked a transition from a centralized imperial structure to a decentralized political landscape in India. This era witnessed the emergence of numerous regional powers that asserted their independence.
• Replacement of kingship with religious councils: While religious institutions like monasteries and temples gained land and influence, the basic unit of political power remained the monarchy, and religious councils did not replace kings as supreme administrative heads. Hence, statement A is incorrect.
• Formation of a central bureaucracy under one emperor: The post-Gupta period was actually characterized by the breakdown of central authority rather than the creation of a new, unified bureaucracy. Power became fragmented among local lords. Hence, statement B is incorrect.
• Rise of smaller kingdoms under hereditary rulers: After the Guptas, various dynasties such as the Pushyabhutis (Vardhanas), Maitrakas, Maukharis, and later the Rajputs established local sovereignty where administrative and military power was held by hereditary elites. Hence, statement C is correct.
• Introduction of democratic village assemblies across India: While certain regions like the far south (under the Cholas later on) had robust village assemblies like the Ur and Sabha, this was not the defining "administrative change" for the whole of post-Gupta India's political structure. Hence, statement D is incorrect.

Additional Information

• Feudalization of Administration: The most significant feature of this period was the rise of the Samanta system. Kings granted land to officers and Brahmins in lieu of cash salaries. These grantees, known as Samantas, eventually became powerful enough to challenge the central authority and establish their own hereditary lineages.
• Harshavardhana of Kannauj: Ruling from 606 to 647 CE, Harsha was the last major ruler who attempted to unify Northern India. However, his empire was more of a loose confederation of feudatories rather than a tightly knit centralized state like the Mauryas. His capital was shifted from Thanesar to Kannauj, which became the political center of gravity.
• Regional Dynasties: The period saw the rise of the Chalukyas of Vatapi in the Deccan and the Pallavas of Kanchi in the South. These kingdoms engaged in constant warfare over fertile river valleys like the Krishna-Godaveri delta, reflecting the competitive nature of regional hereditary politics.
• Land Grants and Economy: The practice of Agrahara (land grants to Brahmins) and Brahmadeya became widespread. This led to a ruralization of the economy as trade declined following the fall of the Roman Empire and the Huna invasions, forcing the political structure to rely heavily on land revenue and local agrarian control.

Important Points

• Tripartite Struggle: Following the death of Harsha, the city of Kannauj became the symbol of sovereignty. This led to the Tripartite Struggle between the Palas of Bengal, the Gurjara-Pratiharas of the West, and the Rashtrakutas of the Deccan during the 8^th to 10^th centuries.
• Bureaucratic Shifts: Administrative posts like the Mahasandhivigrahika (Minister of War and Peace) and Kumaramatyas became increasingly hereditary, further weakening the king's ability to reshuffle his administration and strengthening the local nobility.
• Huna Invasions: The frequent Huna incursions in the 5^th and 6^th centuries disrupted the Gupta trade routes and treasury, providing the catalyst for provincial governors to declare themselves independent Maharajas.

The correct answer is 2.

Key Points

• Atomicity is defined as the total number of atoms present in one molecule of an element, compound, or substance.
• Oxygen naturally exists as a diatomic molecule, represented by the chemical formula O₂. This means that two atoms of oxygen are chemically bonded together to form one stable molecule. Hence, the statement regarding atomicity being 2 is correct.
• The atomicity of 4 is typically seen in elements like Phosphorus (P₄), which is a tetratomic molecule. Hence, the option suggesting 4 is incorrect.
• The atomicity of 3 represents a triatomic molecule, such as Ozone (O₃), which is an allotrope of oxygen but is not the standard oxygen molecule used in respiration. Hence, the option suggesting 3 is incorrect.
• The atomicity of 1 represents monoatomic elements, which are primarily Noble Gases like Helium (He) and Argon (Ar) that do not usually form bonds with other atoms of the same element. Hence, the option suggesting 1 is incorrect.

Additional Information

• Monoatomic Elements: These consist of single atoms. Most metals (in their solid state representation) and noble gases (Group 18 elements) like Neon (Ne) and Krypton (Kr) exhibit an atomicity of 1.
• Diatomic Molecules: Apart from Oxygen (O₂), other common diatomic molecules include Hydrogen (H₂), Nitrogen (N₂), Fluorine (F₂), Chlorine (Cl₂), Bromine (Br₂), and Iodine (I₂). These are often remembered using the mnemonic "Have No Fear Of Ice Cold Beer".
• Triatomic and Polyatomic Molecules: Ozone (O₃) is a triatomic molecule that forms a protective layer in the Earth's stratosphere to absorb harmful UV radiation. Sulfur usually exists as S₈, making it a polyatomic (octatomic) molecule.
• Chemical Nature of Oxygen: Oxygen has an atomic number of 8 and its electronic configuration is 2, 6. To achieve a stable octet, two oxygen atoms share two pairs of electrons, forming a double covalent bond.

Important Points

• Discovery: Oxygen was independently discovered by Carl Wilhelm Scheele in 1772 and Joseph Priestley in 1774. However, Antoine Lavoisier was the one who named it in 1777.
• Abundance: Oxygen is the most abundant element in the Earth's crust, making up about 46.6% of its mass, and it constitutes approximately 21% of the Earth's atmosphere by volume.
• Applications: Oxygen is crucial for aerobic respiration in almost all living organisms. In industrial settings, it is used in steel manufacturing, welding (oxy-acetylene torches), and as rocket propellant in its liquid form (LOX).
• Allotropes: Oxygen has two main allotropes: Dioxygen (O₂), which is essential for life, and Ozone (O₃), which is highly reactive and can be toxic at ground level but vital in the upper atmosphere.

Shortcut Trick

P’s 1 day work = 1/14

Q’s 1 day work = 1/19

In 2 days = 1/14 + 1/19 = 33/266

In 16 days = 264/266

Remaining = 2/266 = 1/133

Extra time by P = 14/133 = 2/19

∴ Answer = $16\frac{2}{19}$ days

Alternate Method

Given:

P = 14 days, Q = 19 days

Calculation:

Take LCM of 14 and 19 = 266 units.

P does 19 units/day and Q does 14 units/day.

In 2 days, total work done = 33 units.

In 16 days (8 cycles), total work = 264 units.

Remaining work = 2 units.

Next turn is P, so time taken = 2/19 day.

Total Time = $16\frac{2}{19}$ days

∴ The correct answer is $16\frac{2}{19}$ days.

Additional Information

Alternate Work Concept

Work is calculated in cycles (P + Q = 2 days)

LCM Method

Assume total work = LCM of individual times

Key Insight

After full cycles, check whose turn comes next

Exam Tip

Always convert final answer into mixed fraction if required

The correct answer is October 10, 2025.

Key Points

• World Mental Health Day is observed globally every year on October 10. In 2025, this date falls on a Friday, as indicated in the first option.
• The day was first celebrated in 1992 at the initiative of the World Federation for Mental Health, a global mental health organization with members and contacts in more than 150 countries.
• The primary objective of this observance is to raise awareness of mental health issues around the world and to mobilize efforts in support of mental health. It provides an opportunity for all stakeholders working on mental health issues to talk about their work and what more needs to be done to make mental health care a reality for people worldwide.
• The World Health Organization (WHO) supports this day by developing technical and communication materials and coordinating global efforts to emphasize the importance of mental well-being as a fundamental human right.
• The theme for World Mental Health Day varies annually, focusing on specific aspects such as mental health in the workplace, suicide prevention, or access to services during emergencies.

Additional Information

• October 24, 2025: This date marks United Nations Day. It celebrates the anniversary of the entry into force of the UN Charter in 1945. With the ratification of this founding document by the majority of its signatories, the United Nations officially came into being.
• July 28, 2025: This date is recognized as World Hepatitis Day. It aims to raise global awareness of hepatitis, a group of infectious diseases known as Hepatitis A, B, C, D, and E, and encourage prevention, diagnosis, and treatment. The date was chosen to honor the birthday of Nobel Laureate Baruch Samuel Blumberg, who discovered the hepatitis B virus.
• August 12, 2025: This date is observed as International Youth Day. Designated by the United Nations in 1999, this day serves as an annual celebration of the role of young women and men as essential partners in change, and an opportunity to raise awareness of challenges and problems facing the world’s youth.
• In India, National Youth Day is celebrated on January 12 to commemorate the birth anniversary of Swami Vivekananda.

Important Points

• National Mental Health Programme (NMHP): In India, the government launched the NMHP in 1982 to ensure the availability and accessibility of minimum mental healthcare for all.
• Mental Healthcare Act, 2017: This significant Act was passed in India to provide for mental healthcare and services for persons with mental illness and to protect, promote, and fulfill the rights of such persons during the delivery of mental healthcare. It effectively decriminalized suicide attempts under Section 309 of the Indian Penal Code.
• KIRAN Helpline: The Ministry of Social Justice and Empowerment launched a 24/7 toll-free mental health rehabilitation helpline number (1800-599-0019) to provide relief and support to persons facing mental health issues.
• MANAS App: Standing for Mental Health and Normalcy Augmentation System, it is a comprehensive national digital wellbeing platform launched by the Government of India to augment mental well-being across age groups.
• Global statistics indicate that nearly 1 billion people live with a mental disorder, and one person dies every 40 seconds by suicide.

The correct answer is resource manager.

Key Points

• The Operating System (OS) is known as a resource manager because its primary function is to manage and allocate the various hardware resources of a computer system, such as the CPU, Main Memory (RAM), Storage, and Input/Output (I/O) devices.
• It acts as an intermediary between the computer user and the computer hardware, providing an environment in which a user can execute programs in a convenient and efficient manner.
• As a resource manager, the OS ensures that multiple programs and users do not conflict with each other by managing how processes access the processor and how much memory is assigned to each task. Hence, the statement describing the OS as a resource manager is correct.
• The Operating System is responsible for process management, where it handles the creation, scheduling, and deletion of processes, ensuring that the CPU is utilized to its maximum potential. Hence, this function is a core part of its resource management role.
• It also handles Memory Management, which involves tracking every single byte in the primary memory and deciding which process will get memory, when it will get it, and how much. Hence, this statement is correct.

Additional Information

• Types of Operating Systems:
• Batch Operating System: This type does not interact with the computer directly; users prepare their jobs on an offline device like punch cards and submit them to the computer operator.
• Time-Sharing Operating System: Allows multiple users to share the computer resources simultaneously. Each task is given a small time slot (quantum) of the CPU time.
• Real-Time Operating System (RTOS): Used in environments where a large number of events, mostly external to the computer system, must be accepted and processed in a short time. Examples include Air Traffic Control systems and Industrial Control Systems.
• Distributed Operating System: Uses multiple central processors to serve multiple real-time applications and multiple users. Data processing jobs are distributed among the processors.
• Common Examples of OS:
• Microsoft Windows: A widely used GUI-based OS for personal computers, first introduced in 1985 by Microsoft.
• Linux: An open-source OS kernel first released on September 17, 1991, by Linus Torvalds. It is known for its security and CLI (Command Line Interface) capabilities.
• macOS: A proprietary graphical operating system developed by Apple Inc. since 2001 for its Macintosh line of computers.
• Android: A mobile operating system based on a modified version of the Linux kernel, designed primarily for touchscreen mobile devices such as smartphones and tablets.
• Key Functions of OS:
• File Management: Managing directories and files on secondary storage (Hard Disks, SSDs).
• Security: Protecting data and programs from unauthorized access through passwords and encryption.
• Device Management: Controlling all the peripheral devices connected to the system using Device Drivers.

Important Points

• Kernel: The Kernel is the central component of an operating system. It is the first program loaded into memory during booting and remains in memory to manage system calls and hardware communication.
• Shell: The Shell is the outer layer of the OS that acts as an interface between the user and the Kernel. It interprets user commands and executes them.
• User Interface (UI): Modern operating systems provide a Graphical User Interface (GUI), which uses WIMP (Windows, Icons, Menus, Pointers) to interact with the user. Older systems used a Character User Interface (CUI) or CLI.
• Booting Process: The process of starting or restarting a computer is called booting. Cold booting happens when the computer is turned on from a completely off state, while warm booting is the process of restarting a computer that is already on.
• History: The first operating system used for real work was GM-NAA I/O, produced in 1956 by General Motors' Research division for its IBM 704.

Given: # : NSO :: SXT : %

Option 1) # = PUQ , % = QVS

For # (PUQ) to NSO

For % (QVS) to SXT

Since, the patterns do not match, Option 1 is incorrect.

Option 2) # = PUQ , % = QVR

For # (PUQ) to NSO

For % (QVR) to SXT

Since, both transformations follow a consistent shift pattern, Option 2 is correct.

Option 3) # = PUQ , % = QWS

For # (PUQ) to NSO

For % (QWS) to SXT

Since, the patterns do not match, Option 3 is incorrect.

Option 4) # = PUR , % = QVS

For # (PUR) to NSO

For % (QVS) to SXT

Since, the patterns do not match, Option 4 is incorrect.

Hence, the correct answer is Option 2.

The correct answer is Violin.

Key Points

• Ms. N. Rajam is a world-renowned virtuoso of the Violin, specifically within the Hindustani Classical Music tradition.
• She is widely credited with pioneering the "Gayaki Ang" (vocal style) on the violin, a technique that allows the instrument to mimic the nuances, ornaments, and emotional depth of the human voice.
• Born in 1938 in Chennai, she belongs to a family of illustrious musicians; she is the daughter of Vidwan A. Narayana Iyer and the sister of the legendary Carnatic violinist T. N. Krishnan.
• She received her advanced training in Hindustani music under the tutelage of the legendary vocalist Pandit Omkarnath Thakur of the Gwalior Gharana.
• Beyond her performance career, she served as a professor and later as the Dean of the Faculty of Performing Arts at Banaras Hindu University (BHU) for nearly 40 years, contributing significantly to music education in India.

Additional Information

• Musical Instruments and Styles:
• Violin: While traditionally a Western instrument, it was integrated into Indian Classical Music (both Carnatic and Hindustani) due to its ability to produce continuous slides (meend) and microtones (gamakas).
• Sitar: A plucked string instrument popular in Hindustani music, famously played by Pandit Ravi Shankar and Ustad Vilayat Khan.
• Sarod: A fretless string instrument known for its deep, introspective sound, mastered by icons like Ustad Amjad Ali Khan.
• Flute (Bansuri): A woodwind instrument made of bamboo, brought to the international stage by Pandit Hariprasad Chaurasia.
• The Gayaki Ang Technique:
• This technique involves complex bowing and fingering methods to reproduce the Khayal style of singing, including Taan, Meend, and Murki.
• N. Rajam broke the conventional barrier where the violin was mostly used for "Gat" (instrumental compositions) in Hindustani music.
• Padma Awards Categories:
• Padma Vibhushan: Awarded for exceptional and distinguished service; it is the second-highest civilian award in India.
• Padma Bhushan: Awarded for distinguished service of a high order.
• Padma Shri: Awarded for distinguished service in any field.

Important Points

• Award History of N. Rajam:
• She was honored with the Padma Shri in the year 1984.
• She received the Padma Bhushan in the year 2004 for her monumental contribution to Indian Art.
• She is also a recipient of the Sangeet Natak Akademi Fellowship (Akademi Ratna), the highest honor conferred by India's national academy for music, dance, and drama.
• Geographic and Cultural Impact:
• Though born in South India (home of Carnatic music), she became a leading figure of the North Indian (Hindustani) tradition, symbolizing the cultural unity of the country.
• Her daughters, Dr. Sangeeta Shankar, and granddaughters, Nandini Shankar and Ragini Shankar, continue her legacy, popularly known as the "Violin Dynasty".

The correct answer is Article 21A.

Key Points

• Article 21A of the Constitution of India declares that the State shall provide free and compulsory education to all children in the age group of six to fourteen years in such a manner as the State may, by law, determine. Hence, Option D is correct.
• This provision was not part of the original Constitution but was inserted by the 86^th Constitutional Amendment Act in the year 2002 to make education a Fundamental Right.
• The term "Compulsory" casts an obligation on the appropriate government and local authorities to provide and ensure admission, attendance, and completion of elementary education by all children in the 6-14 age group.
• The term "Free" signifies that no child shall be liable to pay any kind of fee or charges or expenses which may prevent him or her from pursuing and completing elementary education.
• Consequent to this amendment, the Right of Children to Free and Compulsory Education (RTE) Act, 2009 was enacted to provide the legal framework for the implementation of Article 21A.

Additional Information

• Article 45:
• This is a Directive Principle of State Policy (DPSP). Initially, it provided for free and compulsory education for all children until they complete the age of 14 years.
• However, after the 86^th Amendment Act (2002), its scope was changed to "Early Childhood Care and Education" for all children until they complete the age of six years. Hence, Option B is incorrect.
• Article 51A(k):
• This falls under Fundamental Duties (Part IV-A). The 86^th Amendment Act added a new fundamental duty under Article 51A.
• It states that it shall be the duty of every citizen of India who is a parent or guardian to provide opportunities for education to his child or ward between the age of six and fourteen years. Hence, Option A is incorrect.
• Article 19:
• This Article guarantees six fundamental freedoms to the citizens of India, including freedom of speech and expression, assembly, association, movement, residence, and profession.
• It does not specifically deal with the right to primary education. Hence, Option C is incorrect.

Important Points

• The RTE Act, 2009: This Act became operative on 1^st April 2010. India became one of the 135 countries in the world to make education a fundamental right for every child.
• Judicial Precedents: Before the amendment, the Supreme Court in the Mohini Jain vs. State of Karnataka (1992) and Unnikrishnan vs. State of Andhra Pradesh (1993) cases ruled that the Right to Education is a concomitant to the Fundamental Rights enshrined under Article 21 (Right to Life).
• Provisions of the Act: The RTE Act mandates a 25% reservation for disadvantaged groups and economically weaker sections (EWS) in all private unaided schools.
• Monitoring: The National Commission for Protection of Child Rights (NCPCR) is the designated body to monitor the implementation of the rights provided under the Act.
• Exemptions: It is important to note that Minority Educational Institutions (both religious and linguistic) are exempt from the 25% reservation quota as per various Supreme Court judgments to protect their rights under Article 30.

The correct answer is Entertainment.

Key Points

• The use of computers in movie studios for creating special effects allows filmmakers to simulate complex environments, characters, and events that cannot be captured via traditional filming. Hence, the statement regarding special effects is correct.
• Animation in modern cinema is almost entirely dependent on Computer-Generated Imagery (CGI), which involves creating 3D models and 2D textures to bring characters to life. Hence, the statement regarding animations is correct.
• The primary sector for these applications is Entertainment, where computers are used to enhance the visual and auditory experience of the audience through post-production techniques.
• Powerful computers called Render Farms are utilized to process the massive amounts of data required to generate a single frame of a high-definition movie, often taking several hours per frame.
• This application has transitioned the industry from hand-drawn animation to digital photorealistic rendering, making movies like Toy Story (1995) and Avatar (2009) possible.

Additional Information

• Scientific Research: In this field, computers are used for complex simulations, data analysis, and modeling of natural phenomena. For example, NASA uses computers to simulate space missions and weather forecasting models rely on Supercomputers to process atmospheric data.
• Accounting: Computers in this domain are used for maintaining financial records, managing inventories, and calculating taxes. Specialized software like Tally, SAP, and Microsoft Excel are standard tools for auditors and accountants to ensure accuracy and transparency.
• Banking: This sector employs computers for Online Banking, managing customer databases, and processing electronic fund transfers (EFT). Technologies like Core Banking Solutions (CBS) and Blockchain are used to secure transactions and provide 24/7 access to services through ATMs and mobile apps.
• Other Applications: Education uses computers for E-learning and Digital Libraries; Healthcare utilizes them for MRI, CT scans, and managing Electronic Health Records (EHR); and Defense relies on them for missile guidance systems and cryptography.

Important Points

• Visual Effects (VFX): This is the process by which imagery is created or manipulated outside the context of a live-action shot. Software such as Autodesk Maya, Blender, and Adobe After Effects are industry standards.
• Motion Capture (Mo-cap): A specific computer application where the actions of human actors are recorded and used to animate digital character models, popularized by the character Gollum in The Lord of the Rings.
• Digital Compositing: The technique of combining multiple images from different sources into a single seamless image, which is a core part of post-production in the Entertainment industry.
• Evolution: The first major use of CGI in a feature film was Westworld (1973), which featured a 2D digital image. Today, AI-driven special effects are becoming the new frontier in Hollywood.

Shortcut Trick

Amount = 5 × Principal ⇒ SI = 4P

SI = (P × R × T) / 100

⇒ 4P = (P × R × 6) / 100

⇒ 4 = (6R) / 100

⇒ R = (4 × 100) / 6 = $66\frac{2}{3}\%$

∴ Answer = $66\frac{2}{3}\%$

Alternate Method

Given:

Amount becomes 5 times in 6 years

Formula used:

SI = (P × R × T) / 100

Calculation:

⇒ Amount = P + SI = 5P

⇒ SI = 4P

⇒ Substitute:

4P = (P × R × 6) / 100

⇒ Cancel P:

4 = (6R) / 100

⇒ R = (4 × 100) / 6

⇒ = $66\frac{2}{3}\%$

∴ The required rate is$66\frac{2}{3}\%$ per annum.

Additional Information

Simple Interest Concept

SI = Amount − Principal

Shortcut Insight

If amount = nP ⇒ SI = (n−1)P

Tip

Cancel P early to simplify

The logic followed here is:

Given: D, E, F, G, S, T and U are sitting around a circular table facing the centre

U sits to the immediate right of G

Only three people sit between U and E when counted from the left of U

Only three people sit between G and T when counted from the left of G

D sits to the immediate right of S

Thus, number of people between S and F = 2

Hence, the correct answer is Option 2.

The correct answer is 2014.

Key Points

• The Expert Group to Review the Methodology for Measurement of Poverty, chaired by Dr. C. Rangarajan, was constituted by the Planning Commission in June 2012.
• The committee submitted its final report in July 2014, providing a revised framework for identifying the poor in India.
• The Rangarajan Committee estimated that the poverty ratio in India was 29.5% in the year 2011-12, which meant approximately 363 million people were living below the poverty line.
• It recommended a higher poverty line than the previous Tendulkar Committee, setting the monthly per capita expenditure at ₹972 for rural areas and ₹1407 for urban areas at 2011-12 prices.
• The methodology adopted by the committee moved away from a solely calorie-based approach to a more comprehensive basket of goods including nutrition, clothing, house rent, conveyance, and education.

Additional Information

• Methodology of Rangarajan Committee:
• The group based its estimates on the NSSO 68^th Round survey data on Household Consumer Expenditure for the year 2011-12.
• It proposed a poverty line based on an ideal diet consisting of 2155 kcal of calories, 48 grams of protein, and 28 grams of fat per capita per day in rural areas.
• For urban areas, the requirements were slightly lower at 2090 kcal of calories, 50 grams of protein, and 26 grams of fat.
• The daily per capita expenditure was calculated to be ₹32 for rural and ₹47 for urban residents.
• Comparison with Tendulkar Committee:
• The Tendulkar Committee, which submitted its report in 2009, had estimated the poverty ratio at 21.9% for 2011-12.
• The Rangarajan Committee's higher estimates (29.5%) resulted from the inclusion of a wider variety of non-food essential items and a modified food basket.
• While Tendulkar used a Uniform Reference Period (URP), Rangarajan preferred the Modified Mixed Reference Period (MMRP) to gather expenditure data.

Important Points

• Evolution of Poverty Estimation in India:
• Alagh Committee (1979): Established the first poverty line based on nutritional requirements (2400 kcal rural and 2100 kcal urban).
• Lakdawala Committee (1993): Introduced state-specific poverty lines and used the Consumer Price Index for Agricultural Labourers (CPI-AL) and Consumer Price Index for Industrial Workers (CPI-IW).
• NITI Aayog: Following the dissolution of the Planning Commission in 2014, NITI Aayog now acts as the nodal agency for poverty estimation and monitoring through its Task Force on Elimination of Poverty.
• Global Context:
• The World Bank currently uses a poverty line of $2.15 per person per day (in 2017 Purchasing Power Parity terms) as the International Poverty Line.
• India's domestic measurements remain crucial for targeting government subsidies, the Public Distribution System (PDS), and welfare schemes like MGNREGA$.

The logic followed here is:

Given number: 6587134

Logic:

Add 1 to each odd digit

Subtract 2 from each even digit

Original number: 6 5 8 7 1 3 4

New number: 4 6 6 8 2 4 2

Now, second digit from the left = 6

Hence, the correct answer is Option 4.

Shortcut Trick

Convert decimals to fractions:

3.6 = 18/5, 2.4 = 12/5, 1.4 = 7/5

(18/5 ÷ 3/5) = (18/5 × 5/3) = 6

(7/3 × (12/5 ÷ 7/5)) = (7/3 × 12/7) = 4

(5/6 + 14/12) = (5/6 + 7/6) = 12/6 = 2

Total = 6 + 4 − 2 = 8

∴ Answer = 8

Alternate Method

Given:

(3.6 ÷ 3/5) + (7/3 × 2.4/1.4) − (5/6 + 14/12)

Calculation:

Convert decimals into fractions:

3.6 = 18/5, 2.4 = 12/5, 1.4 = 7/5

⇒ (18/5 ÷ 3/5) = 18/5 × 5/3 = 6

⇒ (7/3 × (12/5 ÷ 7/5))

= 7/3 × (12/5 × 5/7) = 7/3 × 12/7 = 4

⇒ (5/6 + 14/12)

= 5/6 + 7/6 = 12/6 = 2

⇒ Final value = 6 + 4 − 2 = 8

∴ The correct answer is 8.

Additional Information

Decimal Conversion

Convert decimals to fractions for easier calculation

Division Rule

a ÷ b = a × (reciprocal of b)

Simplification Tip

Cancel common factors early

Order of Operations

Solve brackets first, then multiply/divide

The logic followed here is:

48 → 192

⇒ 48 × 4 = 192

52 → 208

⇒ 52 × 4 = 208

So, the pattern is:

Result = Number × 4

Now, applying the same pattern for 61:

⇒ 61 × 4 = 244

Hence, the correct answer is Option 2.

The correct answer is Carbon dioxide, methane, nitrous oxide.

Key Points

• Greenhouse Gases (GHGs) are components of the atmosphere that contribute to the greenhouse effect by absorbing and emitting radiant energy within the thermal infrared range. The primary greenhouse gases in Earth's atmosphere include Carbon Dioxide (CO2), Methane (CH4), and Nitrous Oxide (N2O).
• Carbon dioxide (CO2) is the most significant long-lived greenhouse gas in Earth's atmosphere. Since the Industrial Revolution, anthropogenic emissions—primarily from the use of fossil fuels and deforestation—have caused its atmospheric concentration to rise significantly. Hence, the inclusion of Carbon dioxide in the answer is correct.
• Methane (CH4) is a potent greenhouse gas with a Global Warming Potential (GWP) much higher than CO2. It is emitted during the production and transport of coal, natural gas, and oil, as well as from livestock (enteric fermentation) and agricultural practices. Hence, the inclusion of Methane in the answer is correct.
• Nitrous oxide (N2O) is emitted during agricultural and industrial activities, combustion of fossil fuels and solid waste, as well as during treatment of wastewater. It has a long atmospheric life and a high GWP. Hence, the inclusion of Nitrous oxide in the answer is correct.
• Gases like Nitrogen (N2), Oxygen (O2), and Argon (Ar) are not greenhouse gases because they consist of symmetrical diatomic molecules or single atoms that do not absorb infrared radiation. Hence, options containing these gases are incorrect.

Additional Information

• Kyoto Protocol: This international treaty, adopted in 1997, initially identified six main greenhouse gases that required emission reductions: Carbon dioxide (CO2), Methane (CH4), Nitrous oxide (N2O), Hydrofluorocarbons (HFCs), Perfluorocarbons (PFCs), and Sulfur hexafluoride (SF6).
• Atmospheric Composition: Earth's atmosphere is primarily composed of Nitrogen (78%) and Oxygen (21%). While they are the most abundant, they do not contribute to the greenhouse effect. Trace gases, including GHGs, make up less than 1% of the atmosphere but have a profound impact on global temperature.
• Global Warming Potential (GWP): This is a measure of how much energy the emissions of 1 ton of a gas will absorb over a given period (usually 100 years), relative to the emissions of 1 ton of carbon dioxide. Methane has a GWP of approximately 25-28, while Nitrous Oxide has a GWP of around 265-298.
• Industrial and Synthetic Gases: Fluorinated gases like HFCs, PFCs, and SF6 are man-made and used in applications like refrigeration and electronics manufacturing. Although present in small concentrations, they are extremely potent.

Important Points

• Water Vapor: It is actually the most abundant greenhouse gas in the atmosphere. However, it is not directly increased by human activity; instead, its concentration depends on the atmospheric temperature, creating a feedback loop.
• Concentration Milestones: Atmospheric Carbon dioxide concentrations have surpassed 400 parts per million (ppm) in recent years, a level not seen in millions of years. This rise is primarily attributed to the burning of fossil fuels since the year 1750.
• Impact of Deforestation: Forests act as carbon sinks. When they are cleared or burned, they release stored carbon back into the atmosphere as CO2, exacerbating the greenhouse effect.
• Agricultural Impact: Rice cultivation and cattle rearing are the largest human-related sources of Methane emissions globally.

Shortcut Trick

Sum of exterior angles = 360°

Sum of interior angles = (n − 2) × 180°

Given:

360 = (2/3) × (n − 2) × 180

⇒ 360 = 120(n − 2)

⇒ 3 = n − 2

⇒ n = 5

∴ Answer = 5

Alternate Method

Given:

Sum of exterior angles = (2/3) of sum of interior angles

Formula used:

Sum of exterior angles = 360°

Sum of interior angles = (n − 2) × 180°

Calculation:

⇒ 360 = (2/3) × (n − 2) × 180

⇒ 360 = 120(n − 2)

⇒ Divide by 120:

3 = n − 2

⇒ n = 5

∴ The number of sides = 5.

Additional Information

Exterior Angle Sum

Always equals 360° for any polygon

Interior Angle Sum

(n − 2) × 180°

Key Insight

Use given relation to form equation

Tip

Simplify constants first (360/120 = 3)

Shortcut Trick

Relative speed = 40 + 52 = 92 km/hr

= 92 × (5/18) = 460/18 = 230/9 m/s

Total distance = speed × time

= (230/9) × 18 = 460 m

Length of other train = 460 − 250 = 210 m

∴ Answer = 210 m

Alternate Method

Given:

Speeds = 40 km/hr and 52 km/hr

Time = 18 sec

One train = 250 m

Formula used:

Distance = Relative speed × Time

Calculation:

⇒ Relative speed = 40 + 52 = 92 km/hr

⇒ Convert to m/s:

92 × (5/18) = 230/9 m/s

⇒ Total distance = (230/9) × 18

⇒ = 460 m

⇒ Total distance = sum of lengths

⇒ Length of other train = 460 − 250 = 210 m

∴ The correct answer is 210 m.

Additional Information

Relative Speed

Opposite direction ⇒ speeds add

Unit Conversion

km/hr to m/s ⇒ multiply by 5/18

Train Concept

Crossing ⇒ total length = sum of both trains

The logic followed here is:

Given number: 53764821

Logic:

Add 1 to each odd digit

Subtract 1 from each even digit

Original number: 5 3 7 6 4 8 2 1

New number: 6 4 8 5 3 7 1 2

Greatest digit = 8

Smallest digit = 1

Product = 8 × 1 = 8

Hence, the correct answer is Option 3.

The correct answer is Chairman and Deputy Chairman of the State Legislative Council.

Key Points

• Article 182 of the Constitution of India specifically provides for the Chairman and Deputy Chairman of the Legislative Council. It mandates that every State having a Legislative Council (Vidhan Parishad) shall, as soon as may be, choose two members of the Council to be respectively Chairman and Deputy Chairman thereof. Hence, statement D is correct.
• The Chairman acts as the presiding officer of the house. In the absence of the Chairman, the Deputy Chairman performs the duties of the office.
• This Article ensures the continuity of the leadership within the upper house of the State Legislature. If the office of the Chairman or Deputy Chairman becomes vacant, the Council is constitutionally obligated to choose another member to fill the vacancy.
• Unlike the Speaker of the Legislative Assembly, who is elected by the lower house, the Chairman is elected solely by the members of the Legislative Council from among its own members.

Additional Information

• Composition of State Legislative Assemblies: This is addressed under Article 170. It states that the Legislative Assembly of each State shall consist of not more than 500, and not less than 60, members chosen by direct election from territorial constituencies in the State. Hence, statement A is incorrect in the context of Article 182.
• Disqualification for membership: The criteria for the disqualification of members of either House of the State Legislature are laid down in Article 191. Reasons for disqualification include holding an office of profit, being of unsound mind, insolvency, or not being a citizen of India. Hence, statement B is incorrect in the context of Article 182.
• Special address by the Governor: This provision is found in Article 176. The Governor addresses the Legislative Assembly (or both Houses in bicameral states) at the commencement of the first session after each general election and at the commencement of the first session of each year. Hence, statement C is incorrect in the context of Article 182.
• Article 171: This article deals with the Composition of the Legislative Councils. It specifies that the total number of members in the Legislative Council of a State shall not exceed one-third of the total number of members in the Legislative Assembly of that State, but shall in no case be less than 40.

Important Points

• Vacation and Resignation (Article 183): A member holding office as Chairman or Deputy Chairman of a Legislative Council shall vacate his office if he ceases to be a member of the Council. The Chairman may resign by writing to the Deputy Chairman, and the Deputy Chairman may resign by writing to the Chairman.
• Removal: They can be removed from office by a resolution of the Council passed by a majority of all the then members of the Council, provided that at least 14 days' notice has been given of the intention to move the resolution.
• States with Legislative Councils: Currently, only six states in India have a bicameral legislature (both Vidhan Sabha and Vidhan Parishad). These are Andhra Pradesh, Bihar, Karnataka, Maharashtra, Telangana, and Uttar Pradesh.
• Role of the Chairman: The Chairman has the power to adjourn the House or suspend the meeting in the absence of a quorum. The Chairman does not vote in the first instance but exercises a casting vote in the case of an equality of votes.

Shortcut Trick

First 13 multiples of 8 form an AP

First term = 8, Last term = 8 × 13 = 104

Average = (First + Last) / 2

= (8 + 104) / 2 = 112 / 2 = 56

∴ Answer = 56

Alternate Method

Given:

First 13 multiples of 8

Formula used:

Average of AP = (First term + Last term) / 2

Calculation:

⇒ Sequence: 8, 16, 24, ..., 104

⇒ First term = 8

⇒ Last term = 8 × 13 = 104

⇒ Average = (8 + 104) / 2

⇒ = 112 / 2 = 56

∴ The correct answer is 56.

Additional Information

Arithmetic Progression

Multiples form an AP with common difference

Quick Formula

Average = (first + last) / 2

Tip

No need to list all terms

The correct answer is Part XII.

Key Points

• The Right to Property was originally a Fundamental Right in the Indian Constitution, protected under Article 19(1)(f) and Article 31 in Part III.
• The 44^th Amendment Act, 1978, passed during the tenure of the Janata Party government, abolished the Right to Property as a fundamental right. Hence, the statement that it was removed from Part III is correct.
• Following its removal from Part III, it was re-introduced as a Constitutional Right (or legal right) under Article 300A.
• This new article, Article 300A, is located in Part XII of the Constitution, specifically under the chapter titled 'Finance, Property, Contracts and Suits'. Hence, the statement that it was added to Part XII is correct.
• The primary objective of this shift was to prevent property rights from becoming a hurdle in the implementation of land reforms and other socialist policies aimed at equitable distribution of wealth.

Additional Information

• Article 300A: This article states that "no person shall be deprived of his property save by authority of law." This means that while the state can still acquire private property, it must do so by following a valid law passed by the legislature, rather than through executive action alone.
• Status as a Legal Right: Unlike Fundamental Rights, a legal right does not allow a citizen to directly approach the Supreme Court under Article 32 for its violation. However, a person can still seek remedy through a High Court under Article 226.
• Compensation: After the 44^th Amendment, the state is not constitutionally obligated to pay "compensation" for acquired property except in two specific instances: when the state acquires property of a minority educational institution or land held by a person under personal cultivation within the statutory ceiling limits.
• Historical Context: The conflict between the Judiciary and the Executive over property rights was a defining feature of Indian politics in the 1950s, 1960s, and 1970s, leading to landmark cases like Kameshwar Singh v. State of Bihar and the Bank Nationalization case.

Important Points

• Fundamental Rights (Part III): These are justiciable rights that are fundamental to the development of an individual and are protected by the basic structure of the Constitution. Before 1978, there were seven fundamental rights; currently, there are only six.
• Janata Party Government: The amendment was spearheaded by Prime Minister Morarji Desai in 1978 to reverse several changes made during the Emergency and to settle the long-standing debate on property acquisition.
• Part XII Structure: This part of the Constitution deals with Finance (Articles 264-291), Borrowing (Articles 292-293), Property, Contracts, Rights, Liabilities, Obligations and Suits (Articles 294-300), and the Right to Property (Article 300A).
• Significance of "Authority of Law": This phrase ensures that the Executive cannot seize property arbitrarily. There must be a specific Act or Statute that authorizes such deprivation, ensuring a check on arbitrary power.

The correct answer is Santhal Revolt.

Key Points

• Sidhu Murmu and Kanhu Murmu were the two primary brothers who led the Santhal Rebellion, also known as the Santhal Hool, which broke out in 1855.
• The revolt took place in the Rajmahal Hills region, covering parts of present-day Jharkhand, Bihar, and West Bengal.
• The uprising was a direct response to the oppressive Zamindari system, the exploitation by money lenders (Mahajans), and the revenue policies of the British East India Company.
• The leaders claimed they had received a divine message from Thakur Jiu (God) to liberate the Santhal people from the clutches of the Dikus (outsiders) and establish Santhal Raj.
• On June 30, 1855, nearly 60,000 Santhals gathered at Bhognadih to declare their independence and resolve to fight against the British authorities.

Additional Information

• Paralkot Rebellion (1825):
• This rebellion occurred in the Abujhmarh region of Chhattisgarh.
• It was led by Gend Singh against the interference of the Marathas and the British in the tribal way of life and the imposition of heavy taxes.
• Koi Revolt (1859):
• This was a significant tribal uprising in the Bastar region against the felling of Teak (Sal) trees.
• The revolt is famously remembered for the slogan "One head for one Sal tree," indicating the tribals' readiness to sacrifice their lives for the forest.
• Bastar Rebellion (1910):
• Also known as the Bhumkal Rebellion, it was a major uprising in the princely state of Bastar in Chhattisgarh.
• The rebellion was led by Gunda Dhur and was triggered by forest reservation policies and the exploitation of the local population by colonial officers.
• Daman-i-Koh:
• The British had demarcated a large area of land in the Rajmahal Hills as Daman-i-Koh for the Santhals to settle and practice agriculture.
• The subsequent influx of non-tribal money lenders and zamindars into this area eventually led to the social and economic friction that caused the Santhal Revolt.

Important Points

• The Santhal Rebellion was suppressed by the British Army using modern weaponry, such as artillery and muskets, against the tribal bows and arrows; however, it resulted in significant administrative changes.
• Following the revolt, the British government passed the Santhal Parganas Tenancy Act in 1876, which provided protection to tribal lands by prohibiting their transfer to non-tribal people.
• Every year on June 30^th, Hool Diwas (Martyr's Day) is celebrated in Jharkhand to honor the courage of Sidhu, Kanhu, Chand, and Bhairav.
• The movement is historically considered a major precursor to the First War of Indian Independence in 1857, showcasing organized tribal resistance against colonial hegemony.

Given:

‘TIME’ is coded as ‘3519’

‘EARS’ is coded as ‘6894’

Here, E consistently maps to 9 in the given code set pattern.

Hence, the correct answer is Option 2.

The correct answer is Kathak.

Key Points

• Nalini Asthana and Kamalini Asthana are a distinguished sister duo who have been honored with the Sangeet Natak Akademi Award for the year 2022 for their profound contribution to the field of Kathak.
• They are celebrated exponents of the Benaras Gharana of Kathak, a style that emphasizes graceful movements, spiritual storytelling, and the Bhakti (devotional) tradition of Varanasi.
• In addition to the national academy award, the sisters were also recipients of the Padma Shri, India’s fourth-highest civilian award, in the year 2022, presented by the President of India for their excellence in the Arts.
• The duo is famously known for their Jugalbandi (duet) performances, where they showcase intricate synchronization and rhythmic mastery.
• They have performed extensively on international platforms in over 40 countries, including the USA, Russia, and the UK, serving as cultural ambassadors of Indian heritage.

Additional Information

• Kathak Dance Form:
• Kathak is one of the eight major classical dances of India, originating from the state of Uttar Pradesh in North India.
• The name is derived from the Sanskrit word 'Katha', which means "story", and 'Kathakar', which means "storyteller".
• Key features of Kathak include Tatkar (rapid footwork), Chakkars (lightning-fast spins), and Abhinaya (facial expressions).
• There are three primary Gharanas or schools of Kathak: Lucknow, Jaipur, and Benaras (Varanasi).
• Other Classical Dances in Options:
• Odissi: A classical dance from Odisha, known for its Tribhanga posture (three-fold bending of the body) and fluid movements.
• Kuchipudi: Originating from Andhra Pradesh, this dance-drama form is unique for its Tarangam, where dancers perform on the edge of a brass plate.
• Bharatanatyam: One of the oldest classical dance traditions from Tamil Nadu, characterized by fixed upper torso, bent legs, and complex Mudras (hand gestures).
• Sangeet Natak Akademi:
• The Sangeet Natak Akademi was established in 1952 by the Ministry of Education and is the national level academy for music, dance, and drama in India.
• The Sangeet Natak Akademi Award is the highest national recognition conferred on practicing artists, carrying a purse of Rs. 1,00,000, a citation, and an Angavastram.

Important Points

• The Asthana sisters received their specialized training under Guru Jitendra Maharaj, a legendary figure of the Varanasi (Benaras) school of Kathak.
• The Sangeet Natak Akademi Awards for the years 2022 and 2023 were presented by the President of India, Droupadi Murmu, during a ceremony held at Vigyan Bhawan, New Delhi, in March 2024.
• They are credited with reviving the Temple style of Kathak and have established the Azhar-e-Banaras institute to educate the youth in classical arts.
• Their choreography often integrates Sanskrit literature and ancient Indian poetry, maintaining the traditional essence of the Ganga-Jamuni Tehzeeb.

The logic followed here is based on the alphabetical position pattern:

Option 1: CE → FH

Option 2: HJ → KM

Option 3: MO → PR

Option 4: GI → JM

Thus, GI–JM does not follow the same consistent pattern.

Hence, the odd one out is Option 4.

The correct answer is Legal Services Authorities Act, 1987.

Key Points

• The National Legal Services Authority (NALSA) was constituted under the Legal Services Authorities Act, 1987, to monitor and evaluate the implementation of legal aid programs and to lay down policies and principles for making legal services available under the Act.
• The Legal Services Authorities Act officially came into force on 9^th November 1995 to establish a nationwide uniform network for providing free and competent legal services to the weaker sections of the society.
• The primary function of NALSA is to organize Lok Adalats for amicable settlement of disputes and to spread legal literacy and awareness across the country.
• The Chief Justice of India serves as the Patron-in-Chief of NALSA, while the second senior-most Judge of the Supreme Court of India acts as the Executive Chairman.
• In every State, a State Legal Services Authority (SLSA) has been constituted to give effect to the policies and directions of NALSA and to give free legal services to the people and conduct Lok Adalats in the State.

Additional Information

• Legal Services Authorities Act, 1987 (Option A): This Act provides for the statutory constitution of legal services authorities at the National, State, and District levels. It ensures that opportunities for securing justice are not denied to any citizen by reason of economic or other disabilities. Hence, this statement is correct.
• Advocates Act, 1961 (Option B): This Act was enacted to amend and consolidate the law relating to legal practitioners and to provide for the constitution of Bar Councils and an All-India Bar. It regulates the professional conduct of advocates but did not establish NALSA. Hence, this statement is incorrect.
• Code of Criminal Procedure, 1973 (Option C): Under Section 304 of the CrPC, the court provides legal aid to an accused person if they do not have sufficient means to engage a lawyer at the State's expense. While it supports the concept of legal aid, the administrative body NALSA was not created by this code. Hence, this statement is incorrect.
• Legal Aid and Advice Act, 1972 (Option D): While various committees on legal aid were formed in the 1970s (like the Krishna Iyer Committee in 1973), there is no specific central Act by this name that serves as the founding legislation for NALSA. Hence, this statement is incorrect.

Important Points

• Constitutional Basis: Article 39A of the Constitution of India (inserted by the 42^nd Amendment Act, 1976) directs the State to provide free legal aid by suitable legislation or schemes to ensure that justice is not denied to any citizen due to economic or other disabilities.
• Eligibility: According to Section 12 of the Legal Services Authorities Act, 1987, eligible persons include Women and Children, members of SC/ST, Industrial workmen, victims of mass disasters, violence, floods, or disabled persons.
• National Legal Services Day: To commemorate the 1987 Act, 9^th November is celebrated annually as Legal Services Day across India.
• Administrative Structure: The District Legal Services Authority (DLSA) is constituted in every District to implement legal aid programs, with the District Judge acting as the ex-officio Chairman.
• Funding: NALSA receives grants from the Central Government, which are then distributed to the State and District authorities to facilitate legal aid clinics and awareness camps.

The logic followed here is:

Given numbers: 571, 769, 642, 598, 796

Logic: Find the highest and lowest numbers, then perform the required operation.

Arranging in descending order: 796, 769, 642, 598, 571

Highest number = 796

→ Third digit = 6

Lowest number = 571

→ Second digit = 7

Result = 6 + 7 = 13

Hence, the correct answer is Option 4.

The logic followed here is:

Given:

Shivani walks 7 km East

She turns left → 4 km North

She turns right → 6 km East

She turns right → 4 km South

She turns left → 7 km East

 

So, final position = 20 km East from starting point

Hence, the correct answer is Option 2.

Given: # : XHP :: UEM : %

Option 1) # = NXF , % = EKW

For # (NXF) to XHP

For % (EKW) to UEM

Since, the patterns do not match, Option 1 is incorrect.

Option 2) # = NOF , % = EOW

For # (NOF) to XHP

For % (EOW) to UEM

Since, the patterns do not match, Option 2 is incorrect.

Option 3) # = NXF , % = EOO

For # (NXF) to XHP

For % (EOO) to UEM

Since, the patterns do not match, Option 3 is incorrect.

Option 4) # = NXF , % = EOW

For # (NXF) to XHP

For % (EOW) to UEM

Since, both transformations follow a consistent pattern Option 4 is correct.

Hence, the correct answer is Option 4.

The correct answer is United States of America.

Key Points

• On 31 October 2025, India and the United States signed a landmark 10-year Defence Framework Agreement in Kuala Lumpur, Malaysia.
• The agreement was exchanged between India's Defence Minister Rajnath Singh and U.S. Secretary of War Pete Hegseth on the sidelines of the ASEAN–India Defence Ministers’ Informal Meeting.
• Duration: The framework establishes a roadmap for bilateral defence cooperation over the next 10 years (2025–2035).
• Purpose: It is intended to provide a unified vision and long-term policy direction for the U.S.–India Major Defence Partnership.
• Focus Areas: The pact emphasizes enhancing coordination, information sharing, and defence technology collaboration, particularly in the context of maintaining a free and open Indo-Pacific region.
• Strategic Context: The signing took place during a visit by Rajnath Singh to attend the ASEAN Defence Ministers’ Meeting Plus (ADMM-Plus), reflecting India's "Act East Policy" and deepening strategic convergence with the U.S. despite evolving geopolitical dynamics.
• While India also engaged in significant defence dialogues with Malaysia (MIDCOM meeting in February 2025) and Australia (inaugural Defence Ministers' Dialogue in October 2025), the specific 10-year framework agreement mentioned in your query was signed with the United States.

Additional Information

• Bilateral Defence Exercises: India and Malaysia regularly participate in joint military drills, most notably Exercise Harimau Shakti. This exercise focuses on counter-insurgency and jungle warfare, enhancing interoperability between the Indian Army and the Malaysian Army.
• Defence Production and Exports: Malaysia has shown significant interest in Indian defense platforms, particularly the LCA Tejas (Light Combat Aircraft) and the BrahMos supersonic cruise missile system. The 2025 framework facilitates a smoother roadmap for defence exports and technical support.
• Strategic Location: Malaysia is situated along the Strait of Malacca, one of the world's most important shipping lanes. Cooperation with Kuala Lumpur is vital for India’s Mission SAGAR (Security and Growth for All in the Region) and the Act East Policy initiated in 2014.
• ASEAN-India Relations: The ASEAN–India Defence Ministers’ Informal Meeting is a crucial platform for India to engage with the Association of Southeast Asian Nations. It operates under the broader ADMM-Plus (ASEAN Defence Ministers' Meeting Plus) framework, which includes eight dialogue partners like India, USA, and China.
• Historical Context: Defence relations between the two nations were previously guided by a Memorandum of Understanding (MoU) on Defence Cooperation signed in 1993. The 2025 agreement modernizes these ties to meet contemporary security challenges.

Important Points

• Cyber and Space Security: The new framework specifically mentions collaboration in emerging technologies, including Artificial Intelligence (AI), cyber defence, and satellite tracking, reflecting the changing nature of modern warfare.
• Maintenance and Repair (MRO): A key feature of the 2025 talks was the establishment of Maintenance, Repair, and Overhaul (MRO) facilities in Malaysia for Russian-origin platforms (like the Su-30 MKM), leveraging India's extensive experience with Su-30 MKI jets.
• HADR Operations: Both countries committed to increasing coordination in Humanitarian Assistance and Disaster Relief (HADR) operations to tackle natural calamities in the Bay of Bengal and South China Sea.

The correct answer is Ctrl+Z.

Key Points

• Ctrl+Z is the standard keyboard shortcut used to undo the last action performed in most software applications, including Microsoft Windows, macOS (where it is Command+Z), and various Linux distributions.
• The function of this shortcut is to revert the state of a document or system to the immediate previous step, allowing users to quickly correct mistakes or accidental changes. Hence, statement D is correct.
• In many advanced software programs like Adobe Photoshop, Microsoft Word, or Visual Studio Code, this shortcut can be pressed repeatedly to reverse a sequence of multiple actions stored in the undo history.
• This feature is a fundamental part of the Graphical User Interface (GUI) design philosophy, encouraging non-destructive editing by providing a safety net for users during complex tasks.
• The Ctrl+Z command is widely supported across various file explorers, text editors, web browsers, and integrated development environments (IDEs) globally.

Additional Information

• Ctrl+U (Underline):
• This shortcut is used to underline selected text in word processing applications like MS Word and Google Docs.
• It is a text-formatting feature used to emphasize specific content or headings within a document. Hence, statement A is incorrect in the context of undoing actions.
• Ctrl+E (Center Alignment):
• In software like Microsoft PowerPoint or Word, this shortcut is used to center align the selected paragraph or text block.
• In certain web browsers like Chrome or Edge, it may also be used to focus the address bar for a search query. Hence, statement B is incorrect.
• Ctrl+X (Cut):
• The Ctrl+X shortcut is used to cut a selected item, such as text, a file, or an image, and move it to the system clipboard.
• Unlike copying (Ctrl+C), "cutting" removes the item from its original location so it can be pasted (Ctrl+V) elsewhere. Hence, statement C is incorrect.
• Redo Functionality:
• The opposite of the undo function is Redo, which is typically mapped to the Ctrl+Y shortcut in Windows or Cmd+Shift+Z in macOS.
• This allows users to re-apply an action that was previously reversed by the undo command.

Important Points

• Historical Context: The "Undo" concept and its shortcut were popularized by Xerox PARC in the 1970s and later standardized by Apple and Microsoft in the 1980s to improve human-computer interaction.
• Application Variety: While Ctrl+Z is near-universal for "Undo," its behavior can vary; for example, in a Command Prompt or Terminal, Ctrl+Z might be used to suspend a running process rather than undo text input.
• Software Limitations: Some applications have a limited undo buffer, meaning they can only remember a finite number of actions (e.g., the last 20 to 100 actions) before the oldest actions are permanently saved and cannot be reverted.
• Productivity Impact: Mastering these keyboard shortcuts significantly increases workflow efficiency and digital literacy for professionals across industries, from data entry to software engineering.

Shortcut Trick

Triangles ABC and DEF are congruent

Given ∠A = ∠D ⇒ Correspondence: A ↔ D

So sides correspond as:

AC ↔ DF, AB ↔ DE

Given DE = 5 cm

⇒ AB = 5 cm

∴ Answer = 5 cm

Alternate Method

Given:

ABC ≅ DEF, ∠A = ∠D

AC = DF = 6 cm, DE = 5 cm

Concept used:

In congruent triangles, corresponding sides are equal

Calculation:

⇒ From ∠A = ∠D, match vertices:

A ↔ D, B ↔ E, C ↔ F

⇒ Therefore, corresponding sides:

AB ↔ DE

AC ↔ DF (given)

⇒ Since DE = 5 cm

⇒ AB = 5 cm

∴ The correct answer is 5 cm.

Additional Information

Congruent Triangles

All corresponding sides and angles are equal

Vertex Matching

Order of naming gives correspondence

Key Insight

Once mapping is known, directly equate sides

The correct answer is International Monetary Fund (IMF).

Key Points

• The International Monetary Fund (IMF) is the global organization responsible for the Article IV consultation, which involves a periodic review of a member country's economic health and its exchange rate policies.
• In 2025, following an assessment of the Indian Rupee's (INR) performance against the US Dollar, the IMF reclassified India’s de facto exchange rate regime from a stabilised arrangement to a crawl-like arrangement.
• A crawl-like arrangement is a technical classification used when the exchange rate remains within a narrow margin of 2% relative to a statistically identified trend for a period of at least 6 months.
• This reclassification indicates that the IMF observed the exchange rate moving in a more predictable trend compared to the earlier stabilised classification, where the currency was kept within a very tight range without a definitive trend.
• The Reserve Bank of India (RBI) often contests such reclassifications, maintaining that its interventions in the Foreign Exchange Market are only intended to curb volatility rather than to target a specific exchange rate level or trend.

Additional Information

• International Monetary Fund (IMF):
• Established in 1944 during the Bretton Woods Conference, the IMF is headquartered in Washington, D.C., and currently has 190 member countries.
• The primary mission of the IMF is to ensure the stability of the international monetary system, facilitate international trade, and provide financial assistance to countries facing balance of payments crises.
• The organization is currently led by Managing Director Kristalina Georgieva (as of 2024-2025).
• Exchange Rate Classifications:
• Stabilised Arrangement: Occurs when the exchange rate remains within a 2% margin against an anchor currency for at least 6 months but does not follow a specific trend.
• Floating: A regime where the exchange rate is largely market-determined, with interventions by the Central Bank being rare and aimed only at managing market conditions.
• India officially describes its regime as floating (de jure), but the IMF assigns a de facto classification based on observed market data.
• Special Drawing Rights (SDR):
• The SDR is an international reserve asset created by the IMF in 1969 to supplement its member countries' official reserves. Its value is based on a basket of five currencies: the US Dollar, Euro, Chinese Renminbi, Japanese Yen, and British Pound Sterling.

Important Points

• RBI's Role: The Reserve Bank of India manages India's Foreign Exchange Reserves, which reached approximately $650 billion in late 2024. The RBI uses these reserves to maintain stability in the Forex market.
• External Sector Stability: A crawl-like arrangement classification suggests that while the currency has some flexibility, it follows a path that the IMF deems as influenced by Central Bank actions rather than purely market forces.
• Global Implications: Reclassifications by the IMF are significant as they impact how international investors and credit rating agencies, like Moody's or S&P, perceive a country's monetary policy and economic governance.
• Article IV Consultation: This is a key surveillance tool where IMF economists visit member countries (such as India) to exchange views with the government and the central bank on economic developments$.

The correct answer is Carbon dioxide.

Key Points

• According to the World Meteorological Organization (WMO) Greenhouse Gas Bulletin released in October 2024 (providing data for 2023), global average surface concentrations of Carbon dioxide (CO2) reached 420.0 parts per million (ppm).
• This concentration represents 151% of the pre-industrial level (before the year 1750), which was approximately 278 ppm. Hence, the statement regarding Carbon dioxide reaching this specific threshold is correct.
• Carbon dioxide is the most significant long-lived greenhouse gas in the atmosphere, responsible for approximately 64% of the total radiative forcing (warming effect) since 1750.
• The primary drivers for the increase in CO2 levels are the burning of fossil fuels (coal, oil, and gas), cement production, and land-use changes such as large-scale deforestation.
• The WMO report highlights that as long as emissions continue, greenhouse gases will continue to accumulate in the atmosphere, leading to rising global temperatures.

Additional Information

• Methane (CH4):
• In 2023, atmospheric Methane reached 1934 parts per billion (ppb).
• This level is 265% of the pre-industrial level. About 40% of methane is emitted from natural sources (like wetlands), while 60% comes from human activities such as rice agriculture, livestock, and landfills.
• Nitrous Oxide (N2O):
• The concentration of Nitrous Oxide reached 336.9 ppb in 2023.
• This is 125% of its pre-industrial value. It is both a potent greenhouse gas and an ozone-depleting substance, primarily emitted from nitrogen fertilizers and industrial processes.
• Radiative Forcing:
• The Annual Greenhouse Gas Index (AGGI) shows that from 1990 to 2023, the warming effect from long-lived greenhouse gases increased by 51.5%, with CO2 contributing about 80% of this increase.
• World Meteorological Organization (WMO):
• The WMO is a specialized agency of the United Nations (UN) established in 1950.
• It is headquartered in Geneva, Switzerland, and serves as the authoritative voice on the state of the Earth's atmosphere and climate change.

Important Points

• The Industrial Revolution (starting around 1750) marked the point where human activity began to significantly alter the atmospheric composition through mechanization and fossil fuel use.
• The Paris Agreement aims to limit global warming to well below 2 degrees Celsius, preferably to 1.5 degrees Celsius, compared to pre-industrial levels.
• Greenhouse gas concentrations are measured in parts per million (ppm) or parts per billion (ppb), indicating the number of molecules of the gas per million or billion molecules of dry air.
• The 2024 Bulletin underscores that the 1.5°C target is becoming increasingly difficult to achieve due to the "clumping" of CO2 in the atmosphere, which stays for centuries.