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The correct answer is Pandit Makhanlal Chaturvedi.

• Pandit Makhanlal Chaturvedi was editor of Karmveer News Paper.

Key Points

• He was born on 4^th April 1889 at Babai village in Hoshangabad district of Madhya Pradesh.
• He was the editor of Nationalist journals such as Prabha, Karmveer and Pratap.
• He also wrote Him-Kirtini, Him-Tarangini, Yug Charan and Sahitya Devata.
• His famous poems are Pushp ki Abhilasha,  Kaise Chhand Bana Deti hai, and Deep se Deep Jale.

Additional Information

• Subhadra Kumari Chauhan –
• She was writer of famous poems like, Ek Bikhre Moti and Jhansi Ki Rani.
• She was born on 16^th August 1904 at Nihalpur village of Allahabad (now Prayagraj) district of Uttar Pradesh.
• Harishankar Parsai –
• He was born on 22^nd August 1924 at Jamani village near Itarsi in Hoshangabad district of Madhya Pradesh.
• He was editor of the weekly magazine Vasudha which was published from Jabalpur.
• His other famous poems are Hanste hain, Rote hain, Bhoot ke Panv Peechhe, and Tat ki Khoj.
• He won Sahitya Akademi Award in 1982 for his Satire “Viklang Shraddha Ka Daur”.
• Bhawani Prasad Mishra -
• He was born on 29^th March 1913 at village Tigaria of Hoshangabad district.
• He won Sahitya Akademi Award in 1972 for his book Buni Hui Rassi.

दिये गए विकल्पों सही उत्तर अपराधी होकर भी उल्टे रौब डालना हैं ।

Key Points

• 'एक तो चोरी, दूसरे सीना जोरी' मुहावरे/लोकोक्ति का अभिप्राय है - अपराधी होकर भी उल्टे रौब डालना
• वाक्य प्रयोग:- एक तो उसने मेरी किताब चुरा ली, ऊपर से आँखें दिखा रहा है। इसी को कहते हैं – ‘एक तो चोरी, दूसरे सीनाज़ोरी।’

 Additional Information

• मुहावरा की परिभाषा- ​ऐसे सुगठित शब्द समूह जिनसे लक्षणाजन्य और कभी कभी व्यंजनाजन्य कुछ विशिष्ट अर्थ निकलता है मुहावरा कहलाते हैं। ये शब्द समूह कई बार व्यंग्यात्मक भी हो सकते है। मुहावरे किसी भाषा को जीवंत, रंगीन और सरस बना देती है।
• मुहावरों के प्रयोग से भाषा अधिक सशक्त व प्रभावी हो जाती है। इससे भाषा में सहजता व लालित्य का गुण आता है। इनके प्रयोग से कम से कम शब्दों में अधिक भावों को गहराई से व्यक्त किया जाता है। इससे भाषा की अभिव्यंजना शक्ति बढ़ जाती है।
• कुछ अन्य मुहावरे और उनके अर्थ:-

The correct answer is "A good thing that seemed bad at first"

Key Points

• The idiom "A blessing in disguise" means that something that initially seems bad or unfortunate turns out to be good or beneficial in the end, despite its negative appearance at first.
• It is a situation where a good outcome comes from something that initially appeared to be negative or unfavorable. (यह एक ऐसी स्थिति है जहां एक अच्छा परिणाम किसी ऐसी चीज से आता है जो शुरू में नकारात्मक या प्रतिकूल प्रतीत होती है)
• Therefore, the most appropriate meaning of the idiom "A blessing in disguise" is option 3 "A good thing that seemed bad at first".
• Thus, option 3 is the correct answer.

Shortcut Trick

Use the effective multiplier method for three successive discounts: 10%, 5%, and 3.5%.

Net Multiplier = (1 − 0.10) × (1 − 0.05) × (1 − 0.035)

Net Multiplier = 0.90 × 0.95 × 0.965 = 0.855 × 0.965 = 0.825075

Equivalent Discount = (1 − 0.825075) × 100 = 17.4925%

∴ The correct answer is 17.4925%.

Alternate Method

Given: Three successive discounts of 10%, 5%, and 3(1/2)% (or 3.5%).

Formula: For two successive discounts a and b, Single Discount = (a + b − (a × b)/100)%

⇒ Step 1: Combine first two discounts (10% and 5%):

⇒ D_1,2 = 10 + 5 − (10 × 5)/100 = 15 − 0.5 = 14.5%

⇒ Step 2: Combine result with the third discount (3.5%):

⇒ Net Discount = 14.5 + 3.5 − (14.5 × 3.5)/100

⇒ Net Discount = 18.0 − (50.75)/100

⇒ Net Discount = 18.0 − 0.5075

⇒ Net Discount = 17.4925%

∴ The correct answer is 17.4925%.

Additional Information

Successive Discount Formula

For multiple discounts, it is always easier to calculate the selling price factor: SP = MP × (1 − d₁/100) × (1 − d₂/100) ...

Order of Discounts

The net equivalent discount remains the same regardless of the order in which successive discounts are applied.

Marked Price and Selling Price

Discount is always calculated on the Marked Price (MP). SP = MP − Discount.

• Snail can change their sex.
• Snails are obligate hermaphrodites. They have male and female reproductive organs.
• They are able to produce sperm and eggs while mating with a partner.
• The male reproductive organ of the snail can never fertilize the female genitals of the snail.
• When the two snails detach, each snail has eggs fertilized by the sperm of the other snail.

The correct answer is Tripura.

Key Points

• Tripura is surrounded by Bangladesh on three sides i.e north, south, and west.
• Tripura shares an 856-kilometre border with Bangladesh.

दिए गए विकल्पों में पशु शब्द रूढ़ शब्द का उदहारण है क्योंकि जिन शब्दों का कोई भी खण्ड सार्थक नहीं होता, वे रूढ़ शब्द कहलाते हैंl

इसके कोई खंड नहीं हो सकतेl अतः स्पष्ट है कि पशु विकल्प सटीक हैl अन्य विकल्प असंगत हैंl

Key Points

जिन शब्दों का कोई भी खण्ड सार्थक नहीं होता, वे रूढ़ शब्द कहलाते हैंl 

Additional Information

The correct answer is The.

Key Points

• When referring to specific or particular nouns, the is used.
• The is known as the definite article.
• When a noun is specific, the definite article, "the", is used before both the singular and plural forms of the word.
• A definite article can also be used to denote that something is special and there is only one of it.
• "The" goes before the names of holy books, rivers, oceans, mountains, monuments, newspapers, heavenly bodies, etc.
• Example- The Quran, The Gita, The Bible, The Ganga, The Yamuna etc.
• When writing in English, it is customary to capitalize the first letter of a sentence and all proper nouns (words that name a specific person, place, organization, or thing).
• The Bible is a specific holy book we are talking about, so we use the definite article "The" here.

Additional Information

• There are two indefinite articles in English: a and an.
• "An" is used before vowels or vowel sounds.
• Whereas "a" is used before consonants or consonant sounds.
• Indefinite articles are basically the opposite of definite articles and have multiple functions.

Shortcut Trick

Ratio of height (h) to radius (r) = 7 : 5. Let h = 7x and r = 5x.

Volume = πr²h ⇒ 3.14 × (5x)² × (7x) = 14836.5

549.5x³ = 14836.5 ⇒ x³ = 27 ⇒ x = 3. So, r = 15 cm and h = 21 cm.

Total Surface Area = 2πr(h + r) = 2 × 3.14 × 15 × (21 + 15) = 94.2 × 36 = 3391.2 cm².

∴ The correct answer is 3391.2 cm².

Alternate Method

Given: Ratio h : r = 7 : 5, Volume = 14836.5 cm³, π = 3.14.

Formula Used: Volume of cylinder = πr²h; Total Surface Area (TSA) = 2πr(h + r).

⇒ Volume = 3.14 × (5x)² × 7x = 14836.5

⇒ 3.14 × 25x² × 7x = 14836.5

⇒ 549.5x³ = 14836.5

⇒ x³ = 14836.5 ÷ 549.5 = 27

⇒ x = √³27 = 3

⇒ Radius (r) = 5 × 3 = 15 cm; Height (h) = 7 × 3 = 21 cm

⇒ TSA = 2 × 3.14 × 15 × (15 + 21)

⇒ TSA = 94.2 × 36 = 3391.2 cm²

∴ The correct answer is 3391.2 cm².

Additional Information

Curved Surface Area (CSA)

The lateral area of a cylinder excluding its bases is given by CSA = 2πrh.

Volume of a Cylinder

The capacity or space occupied is Volume = Area of base × height = πr²h.

Total Surface Area Relationship

TSA is the sum of the curved surface area and the area of the two circular bases: TSA = 2πrh + 2πr².

The correct answer is Dmitri Ivanovsky.

Explanation:

• A Virus is an infectious agent that replicates only inside the living cells of an organism.
• The virus was discovered by Dmitri Ivanovsky.
• The tobacco mosaic virus is the first discovered virus.
• The study of viruses is known as virology.
• Virology is a subfield of microbiology.
• Important diseases caused by the virus are:
• Smallpox
• Chickenpox
• SARS
• Polio
• Rabies
• Dengue fever
• Measles
• Common cold

Additional Information

• The smallpox vaccine was discovered by 'Edward Jenner' in 1796.
• Small Pox is caused due to Variola Virus.
• Robert Koch gave a great contribution to the field of microbiology.​
• Tuberculosis was first discovered in the year 1882 by Dr Robert Koch.
• He discovered cholera's livelihoods in 1883 after which he was awarded the Nobel Prize in 1905.
• Robert Koch is considered the 'father of microbiology due to studies on microbes.
• Robert Hooke discovered the cell.
• Robert Hooke also discovered the law of elasticity.