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The correct answer is C.

• **93^rd Amendment -**This amendment was done in 2006.
• In this, reservation of seats has been arranged for admission of citizens of scheduled castes and tribes and other backward classes in educational institutions.
• 91^st Amendment - By this Amendment Act 2003, a change was made in the provisions of the Tenth Schedule.
• It abolished a provision that would no longer be considered disqualification on the basis of party-change in case of division, provided such division includes at least one-third of the concerned party.
• 92^nd Amendment - Four new languages were added to the eighth schedule. They are Bodo, Dogri, Maithili, and Santhali.
• With this, the total number of constitutionally recognized languages increased to 22.

The correct answer is A.

Key Points

• The smallpox vaccine was discovered by 'Edward Jenner'.
• Small Pox is caused due to Variola Virus.
• This is a viral disease that transmits from one person to answer person.
• It affects the skin and the whole body.

Additional Information

• 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.
• Pearl Louella Kendrick was an American bacteriologist and he was famous for co-developing the first vaccine with Grace Eldering and Loney Gordon for whooping cough.
• Alexander Fleming was a Scottish physician-scientist who discovered penicillin.

The correct answer is B.

• Podophyllum is an endangered Indian medicinal plant.

Important Points

• Opium, the narcotic drug that is obtained from the unripe seedpods of the opium poppy.
• "Morphine" is found in opium, which is processed into a narcotic drug called heroin.
• Basil is a 'dicot' and medicinal plant.
• Basil is also known as tulsi.
• Even in Ayurveda, Tulsi is considered a plant rich in medicinal properties.​
• The botanical name of Tulsi is 'Ocimum sanctum Linn'.

Concept used:

Follow BODMAS rule to solve this question, as per the order given below,

Calculation:

3668 ÷ 524 – 9

⇒ 3668/524 – 9

⇒ 7 – 9

∴ –2

Given:

We have to find HCF of 4432, 3324

Calculation:

Factors of 4432

⇒ 4432 = 2 × 2 × 2 × 2 × 277

⇒ 2⁴ × 277

Factors of 3324

⇒ 3324 = 2 × 2 × 3 × 277

⇒ 2² × 3 × 277

HCF(4432, 3324)

⇒ 2² × 277

⇒ 1108

∴ The HCF of 4432, and 3324 is 1108.

Given,

Statement:

All countries are districts

Some villages are not districts

Conclusions:

1. All countries are villages
2. Some countries are villages
3. Some villages are not countries
4. Some countries are not villages

The least possible Venn diagram for the given statements is as follows,

Conclusions:

1. All countries are villages → False (It is possible but not definite)
2. Some countries are villages → False (It is possible but not definite)
3. Some villages are not countries → False (It is possible but not definite)
4. Some countries are not villages → False (It is possible but not definite)

Hence, the correct answer is A. None follow.

Given:

Length of rectangle = 6 cm

Width of rectangle = 2 cm

Formula used:

Pythagoras theorem

hypotenuse² = perpendicular² + base²

Calculation:

Let the diagonal be 'd'.

⇒ d² = length² + width²

⇒ d² = 6² + 2²

⇒ d2 = 36 + 4

⇒ d2 = 40

⇒ d = √40

⇒ d = 2√10 cm

∴ The diagonal of the rectabgle is 2√10 cm.

Given,

If '+' is '×', '-' is '+', '×' is '÷' and '÷' is '-'

21 ÷ 8 + 2 - 12 × 3 = ?

∴ 21 - 8 × 2 + 12 ÷ 3 = 21 - 16 + 4 = 9

Hence, the correct answer is 9.

Given:

Ratio of two numbers = 2 : 9

HCF = 32

Concept used:

(i) If a and b are two numbers, then a × b = HCF × LCM

(ii) HCF of two numbers is the highest common factor of both of them. 

Calculations:

Let the numbers be 2x and 9x.

Then, H.C.F. = x

As we have given, x = 32

First number is 2x.

⇒ 2 × 32 = 64

Second number is 9x.

⇒ 9 × 32 = 288

a × b = HCF × LCM

⇒ 64 × 288 = 32 × LCM

⇒ LCM = 576

∴ The LCM is 576.

Given:

Cheating percent while buying and selling = 12%

Formula Used:

Profit % = [(S.P - C.P)/C.P × 100]

Calculation:

Shopkeeper buy 112 gm goods instead of 100 gm by cheating

And he sells 88 gm instead of 100 gm

According to the question

SP/CP = (112 × 100)/(100 × 88)

⇒ 14/11

Profit = SP - CP

⇒ 14 - 11 = 3

Profit Percentage = (3/11) × 100%

⇒ 27.27%

∴ The shopkeeper earned 27.27% profit.  

Shopkeeper cheats 12% in weight while buying as well as selling

Cost price for shopkeeper = [100 × (100 - 12)]/100

⇒ 88

Selling price for shopkeeper = [100 × (100 + 12)]/100

⇒ 112

Profit % = [(S.P - C.P)/C.P] × 100% 

⇒ [(112 - 88)/88] × 100%

⇒ (24/88) × 100%

⇒ 27.27%

∴ The shopkeeper earned 27.27% profit.