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Question 21

Bihar Police SI 2026• Test

In the three-tier structure of the Panchayati Raj system in India, which body is elected at the grassroots level?

  1. AOption (a)

     Panchayat Samiti

  2. BOption (b)

    Gram Panchayat

  3. COption (c)

    Zila Parishad

  4. DOption (d)

    Block Samiti

View answer & explanation

Correct answer

Answer: (b)B.

Gram Panchayat

Why this answer is correct

The correct answer is Gram Panchayat.

Key Points

  • The Gram Panchayat is the grassroots-level body in the three-tier Panchayati Raj system in India.
  • It is directly elected by the people of the village, forming the first tier of the Panchayati Raj system.
  • The Gram Panchayat is responsible for local governance and development activities in villages.
  • Its members are elected for a term of five years by the eligible voters in the village.
  • The head of the Gram Panchayat is called the Sarpanch, who is also elected by the villagers.

Additional Information

  • Panchayati Raj System in India:
  • The Panchayati Raj system is a decentralized form of governance in which gram panchayats are the basic units of administration.
  • It was constitutionalized through the 73rd Constitutional Amendment Act, 1992.
  • The system has three levels: Gram Panchayat (village level), Panchayat Samiti (block level), and Zila Parishad (district level).
  • Roles and Responsibilities of Gram Panchayat:
  • Implementation of development programs such as rural housing, sanitation, and drinking water supply.
  • Maintenance of public assets like roads, schools, and community centers.
  • Promotion of literacy, health, and awareness programs in rural areas.
  • Funding of Gram Panchayats:
  • Funds are provided through grants from the central and state governments, revenue generated locally, and other sources.
  • The Finance Commission recommends financial allocations to Panchayati Raj institutions.
  • Importance of Grassroots Governance:
  • It ensures that governance is inclusive and caters to the specific needs of rural populations.
  • It encourages local participation in decision-making and promotes accountability.

Question 22

Bihar Police SI 2026• Test

Match List - I with List - II.

List - I (Demographic feature)List - II (Country)
(A)Very High fertility rate(I)India and Pakistan
(B)One Child Norm(II)Pakistan
(C)High density of population(III)China
(D)Mixed economy(IV)India

​Choose the correct answer from the options given below:

  1. AOption (a)

    (A) - (I), (B) - (II), (C) - (IV), (D) - (III)

  2. BOption (b)

    (A) - (II), (B) - (III), (C) - (IV), (D) - (I)

  3. COption (c)

    (A) - (III), (B) - (IV), (C) - (I), (D) - (II)

  4. DOption (d)

    (A) - (IV), (B) - (I), (C) - (II), (D) - (III)

View answer & explanation

Correct answer

Answer: (b)B.

(A) - (II), (B) - (III), (C) - (IV), (D) - (I)

Why this answer is correct

The correct answer is - (A) - (II), (B) - (III), (C) - (IV), (D) - (I)

Key Points

  • Very High Fertility Rate - Pakistan
  • Pakistan has one of the highest fertility rates in the world. This demographic feature is characterized by a high number of births per woman.
  • This high fertility rate can be attributed to cultural, social, and economic factors.
  • One Child Norm - China
  • China implemented the one-child policy in 1979 to control its rapidly growing population.
  • This policy has been one of the most significant social engineering efforts in the world, leading to various demographic changes.
  • High Density of Population - India
  • India is known for its high population density, particularly in urban areas such as Mumbai, Delhi, and Kolkata.
  • This high density poses challenges for infrastructure, healthcare, and other public services.
  • Mixed Economy - India and Pakistan
  • Both India and Pakistan follow a mixed economy model, which incorporates elements of both capitalism and socialism.
  • This model allows for private enterprise to coexist with government intervention in economic activities.

Additional Information

  • Demographic Features
  • Demographic features refer to the statistical characteristics of a population. These can include age, gender, income, education, and employment, among others.
  • Understanding these features helps in planning and implementing policies for economic and social development.
  • Fertility Rate
  • The fertility rate is a measure of the number of children born to women of childbearing age (usually 15-49 years) in a given population.
  • High fertility rates can lead to rapid population growth, which can strain resources and infrastructure.
  • One-Child Policy
  • China's one-child policy was introduced to curb population growth and improve living standards.
  • The policy has had long-term effects on the country's demographic structure, leading to an aging population and gender imbalances.
  • Population Density
  • Population density is the number of people living per unit area of land. It is a key indicator of how crowded a place is.
  • High population density can lead to challenges such as housing shortages, traffic congestion, and environmental degradation.
  • Mixed Economy
  • A mixed economy features both private and public ownership of property and businesses.
  • This type of economy aims to balance the benefits of a free market with the social welfare provided by government intervention.

Question 23

Bihar Police SI 2026• Test

What will be the position and nature of the image of an object positioned between C and F of a concave mirror? 

  1. AOption (a)

    Beyond C, real and inverted 

  2. BOption (b)

    Beyond C, virtual and erect 

  3. COption (c)

    Between F and C, real and inverted 

  4. DOption (d)

    Between F and C, virtual and erect

View answer & explanation

Correct answer

Answer: (a)A.

Beyond C, real and inverted 

Why this answer is correct

The correct answer is Beyond C, real and inverted.

Key Points

  • When an object is placed between the center of curvature (C) and the focal point (F) of a concave mirror, the image formed is real, inverted, and located beyond C.
  • The image is formed by the reflection of light rays that converge after bouncing off the mirror surface.
  • The image size is larger than the object, making it magnified.
  • This type of image formation is utilized in various optical devices like telescopes and microscopes.
  • Concave mirrors are often used in applications where magnified images of objects are required.

Additional Information

  • Concave Mirrors:
  • Concave mirrors have a reflective surface that curves inward, resembling a portion of the interior of a sphere.
  • They are also known as converging mirrors because they converge incoming light rays to a focal point.
  • Center of Curvature (C):
  • It is the center of the sphere from which the concave mirror is a part.
  • The distance from the mirror to the center of curvature is called the radius of curvature.
  • Focal Point (F):
  • The point where parallel light rays converge after reflecting off the concave mirror.
  • The distance from the mirror to the focal point is called the focal length.
  • Image Formation by Concave Mirrors:
  • When an object is placed at different positions relative to the focal point and center of curvature, the nature of the image formed (real or virtual, upright or inverted) varies.
  • The mirror formula 1/f = 1/v + 1/u relates the object distance (u), image distance (v), and focal length (f).
  • Applications:
  • Concave mirrors are used in various applications such as shaving mirrors, satellite dishes, headlights, and reflecting telescopes.
  • Their ability to form magnified images makes them useful in scientific and medical instruments.

Question 24

Bihar Police SI 2026• Test

Which one among the following tissues help to connect two bones ? 

  1. AOption (a)

    Tendons 

  2. BOption (b)

    Ligaments 

  3. COption (c)

    Areolar tissue 

  4. DOption (d)

    Cartilage 

View answer & explanation

Correct answer

Answer: (b)B.

Ligaments 

Why this answer is correct

The correct answer is Ligaments

Explanation:

  • Ligaments are a type of connective tissue that connect one bone to another bone, providing stability and support to joints.
  • They are composed mainly of long, stringy collagen fibers which provide great tensile strength.
  • Ligaments are crucial for maintaining the structural integrity of the skeletal system, especially in joints where they help to prevent excessive movements that could lead to dislocation or injury.
  • Tendons: Tendons are connective tissues that attach muscles to bones, not bones to bones. They play a key role in transmitting the force generated by muscles to the bones, enabling movement.
  • Areolar tissue: Areolar tissue is a loose connective tissue that holds organs in place and attaches epithelial tissue to other underlying tissues. It also surrounds blood vessels and nerves. It does not connect bones to each other.
  • Cartilage: Cartilage is a flexible connective tissue found in various forms in the body, such as in the joints between bones (as articular cartilage), the rib cage, the ear, the nose, and the bronchial tubes. It provides support and flexibility but does not directly connect bones to each other.

Question 25

Bihar Police SI 2026• Test

Consider the following statements regarding the performance of the power sector in Bihar:

  1. Demand for power in Bihar has increased substantially in the last decade.
  2. The state government has ensured almost cent-percent power supply.
  3. The peak demand increased by almost 1.4 times during 2018-19 to 2023-24.

​Which of the statements given above is/are correct?

  1. AOption (a)

    1 and 2 only

  2. BOption (b)

    2 and 3 only

  3. COption (c)

    1 and 3 only

  4. DOption (d)

    1, 2 and 3

View answer & explanation

Correct answer

Answer: (c)C.

1 and 3 only

Why this answer is correct

The correct answer is option 2.

Key Points

Statements 1 and 3 are correct:

  • Demand has increased significantly.
  • Peak demand rose 1.4x from 2018-19 to 2023-24. Statement 2, while partially true, is not considered fully accurate due to practical gaps in achieving 100% supply, as per Survey’s phrasing.

Question 26

Bihar Police SI 2026• Test

Which part of a flower contains a single carpel or a group of fused carpels, usually differentiated into ovary, style, and stigma and helps in the process of receiving pollen and fertilization?

  1. AOption (a)

    Pistil

  2. BOption (b)

    Sepals

  3. COption (c)

    Stamens

  4. DOption (d)

    Pollen

View answer & explanation

Correct answer

Answer: (a)A.

Pistil

Why this answer is correct

The correct answer is Pistil.

Key Points

  • The pistil is the female reproductive part of a flower.
  • It typically consists of three main parts: the ovary, style, and stigma.
  • The ovary contains ovules, which develop into seeds upon fertilization.
  • The style is a slender stalk that connects the ovary to the stigma.
  • The stigma is the receptive tip of the pistil that collects pollen.

Additional Information

  • Sepals: These are the outer parts of the flower that protect the developing bud.
  • Petals: Often colorful parts of a flower that attract pollinators.
  • Stamens: The male reproductive parts of a flower, consisting of anthers and filaments.
  • Pollen: The fine powder produced by the anthers of the stamens, containing male gametes.
  • Pollination: The process by which pollen is transferred from the anther to the stigma, leading to fertilization.

Question 27

Bihar Police SI 2026• Test

Which of the following option is the correct order of mountains from north to south in Asia?

  1. AOption (a)

    Kolyma, Stanovoy, Cherskiy and Yablonovy

  2. BOption (b)

    Kolyma, Cherskiy, Yablonovy and Stanovoy

  3. COption (c)

    Cherskiy, Kolyma, Stanovoy and Yablonovy

  4. DOption (d)

    Kolyma, Cherskiy, Stanovoy and Yablonovy

View answer & explanation

Correct answer

Answer: (d)D.

Kolyma, Cherskiy, Stanovoy and Yablonovy

Why this answer is correct

The correct answer is Kolyma, Cherskiy, Stanovoy, and Yablonovy.

Key Points

  • Kolyma Mountains: Located in northeastern Siberia, these mountains lie in the northernmost part of the sequence, closer to the Arctic Ocean. Their position marks the northern boundary of this chain.
  • Cherskiy Range: Found south of the Kolyma Mountains, the Cherskiy Range stretches across parts of northeastern Siberia, making it the next in the north-to-south order.
  • Stanovoy Range: Situated further south, near the border of Siberia and the Russian Far East, the Stanovoy Range acts as a transitional mountain range between northern and southern Asia.
  • Yablonovy Range: Positioned in the southern part of eastern Siberia, the Yablonovy Range completes the sequence as the southernmost mountain range in this order.
  • This sequence is determined based on the geographic latitude of each mountain range, ensuring an accurate north-to-south alignment.

Additional Information

  • Kolyma Mountains:
  • Located in the northeastern region of Russia, near the Kolyma River basin.
  • Known for its extreme cold climate and permafrost due to proximity to the Arctic Ocean.
  • Rich in gold and other minerals, contributing to mining activities in the region.
  • Cherskiy Range:
  • Named after Polish geographer and explorer Ivan Cherski.
  • Home to some of the highest peaks in northeastern Siberia, including the Pobeda Peak.
  • Features rugged terrain with glaciers and tundra vegetation.
  • Stanovoy Range:
  • Extends across southern Siberia, forming a natural boundary between Siberia and the Russian Far East.
  • Acts as a watershed for several rivers, including the Lena River.
  • Known for its dense forests and diverse wildlife.
  • Yablonovy Range:
  • Located in the southern part of Siberia, near the Trans-Baikal region.
  • Rich in minerals like coal and iron ore, playing a vital role in regional mining industries.
  • Known for its scenic beauty and biodiversity, attracting eco-tourism.

Important Points

  • Geographical Order: The north-to-south arrangement of mountain ranges helps in understanding the climatic zones and biodiversity distribution in Asia.
  • Environmental Significance: These mountain ranges play a crucial role in influencing weather patterns and acting as watersheds for major rivers.
  • Economic Importance: Many of these ranges are rich in natural resources, including minerals and forests, contributing to regional economies.
  • Exploration and Research: These ranges have been the subject of various geological and ecological studies due to their unique features.

Question 28

Bihar Police SI 2026• Test

Which one among the following separation techniques is used for blood tests in diagnostic laboratories ? 

  1. AOption (a)

    Filtration 

  2. BOption (b)

    Chromatography  

  3. COption (c)

    Centrifugation 

  4. DOption (d)

    Crystallization 

View answer & explanation

Correct answer

Answer: (c)C.

Centrifugation 

Why this answer is correct

The correct answer is Centrifugation

Explanation:

  • Centrifugation is a technique that involves the use of centrifugal force to separate components of a mixture based on their density.
  • It is widely used in laboratories for the analysis of blood samples, among other applications.
  • In blood tests, centrifugation helps to separate blood cells from plasma or serum, which is essential for various diagnostic tests.
  • The rate of separation in a suspension of particles by way of gravitational force mainly depends on the particle size and density.
  • Particles of higher density or larger size typically travel at a faster rate and at some point will be separated from particles less dense or smaller.
  • In blood tests, centrifugation is employed to separate the different components of blood, such as plasma, red blood cells (erythrocytes), white blood cells (leukocytes), and platelets.

Other Options:

  • Filtration: This technique is used to separate solids from liquids or gases using a filter medium that allows only the fluid to pass through. It is not suitable for separating components of blood.
  • Chromatography: This method is used to separate and analyze components of a mixture based on their movement through a stationary phase. While useful for many applications, it is not typically used for routine blood tests in diagnostic laboratories.
  • Crystallization: This process involves the formation of solid crystals from a homogeneous solution. It is generally used in chemical processes for purifying substances and not for blood analysis.

Question 29

Bihar Police SI 2026• Test

Which of the following pairs is correctly matched? 

  1. AOption (a)

    Mission Shakti - Startup grants for rural men 

  2. BOption (b)

    PM-AAGY - Railway safety in backward areas

  3. COption (c)

    Swadesh Darshan 2.0 - Theme-based tourism circuits

  4. DOption (d)

    PM-JANMAN Urban housing for tribals

View answer & explanation

Correct answer

Answer: (c)C.

Swadesh Darshan 2.0 - Theme-based tourism circuits

Why this answer is correct

The correct answer is Swadesh Darshan 2.0 - Theme-based tourism circuits.

Key Points

  • Swadesh Darshan 2.0 is an upgraded version of the Swadesh Darshan Scheme, focusing on sustainable and theme-based tourism circuits.
  • Launched by the Ministry of Tourism, it aims to enhance tourism infrastructure and create employment opportunities in tourism-focused areas.
  • The scheme prioritizes the development of circuits based on themes such as cultural heritage, ecotourism, adventure, and wellness tourism.
  • It aligns with the vision of promoting responsible tourism, ensuring environmental sustainability and socio-economic benefits to local communities.
  • Funding is provided for infrastructure development, capacity building, and marketing under this initiative to bolster India's tourism sector.

Additional Information

  • Swadesh Darshan Scheme (Original Version)
  • Launched in 2014-15, the original scheme aimed at developing theme-based tourist circuits across India.
  • Some of the circuits include Buddhist Circuit, Himalayan Circuit, Coastal Circuit, and Tribal Circuit.
  • It focused on integrated development of tourism infrastructure in specific destinations.
  • Incredible India Campaign
  • A flagship campaign by the Ministry of Tourism to promote India's rich cultural heritage globally.
  • It emphasizes India's diversity, historical landmarks, and unique experiences for international tourists.
  • National Tourism Policy 2022
  • Aims to position India as a global tourism hub and strengthen domestic tourism.
  • Focuses on sustainable tourism, digitalization, and supporting local businesses in the tourism sector.
  • Eco-Tourism in India
  • Promotes responsible travel to natural areas, conserving the environment and improving the well-being of locals.
  • Popular destinations include Kaziranga National Park, Sundarbans, and Silent Valley National Park.

Question 30

Bihar Police SI 2026• Test

Where was the 25th Shanghai Cooperation Organization (SCO) Summit held in 2025?

  1. AOption (a)

    Beijing, China

  2. BOption (b)

    Tianjin, China

  3. COption (c)

    New Delhi, India

  4. DOption (d)

    Moscow, Russia

View answer & explanation

Correct answer

Answer: (b)B.

Tianjin, China

Why this answer is correct

The correct answer is Tianjin, China.

In News

  • The 25th SCO Summit was held in Tianjin, China, from August 31 to September 1, 2025.

Key Points

  • The 25th SCO Summit took place in Tianjin, China, with discussions focusing on security, global governance, economic cooperation, and sustainable development.
  • PM Modi highlighted India’s vision for SCO under three pillars: security, connectivity, and opportunity.
  • The summit resulted in the adoption of the Tianjin Declaration, reaffirming commitments to peace, cooperation, and a shared future.
  • India reiterated its support for SCO reforms and the need for a multilateral system that represents the Global South's interests.

Additional Information

  • Tianjin Declaration
  • The Tianjin Declaration emphasized collective efforts in AI, energy, sustainable development, and shaping a shared future for humanity.
  • SCO Vision
  • PM Modi presented India’s approach to the SCO, focusing on combating terrorism, promoting infrastructure, and fostering innovation and cultural dialogue.
  • Chabahar Port and INSTC
  • India reaffirmed its support for the Chabahar Port and the International North-South Transport Corridor to enhance connectivity and trade in the region.
  • Civilizational Dialogue Forum
  • A proposal by PM Modi to establish a forum under SCO to promote cultural exchanges and understanding among member nations.