C is sitting immediate right to A. Thus, option C is incorrect.

Hence, option C is the correct answer.

Statements:

1. B. is heavier than A(it’s alone not sufficient because no information is given about C and D.)

2. A is lighter than C and D(its alone not sufficient because no information is given about B.)

from 1 and 2 together:

(C,D)>B>A(case 1)

N>(C,D)> A(case 2)

A is lightest in both the cases. so, A is lightest.

So, Statement 1 and 2 together are necessary.

Hence, option B is the correct answer.

I) Regular safety audit will improve the safety and security of airports subsequently, reducing the frequency of plane accidents. So, course of action (I) is a right approach.

II) Shorter length of the runway is more dangerous and prone to accidents. So, course of action (II) is not the right approach.

Hence, option A is the correct answer.

Given, 3.cos2x + cosx = −1 and 0<x<90°,
We know, [cos2x = 2cos²x−1]
⇒ 3(2cos²x−1) + cosx = −1
⇒ 6cos²x − 3 + cosx = −1
⇒ 6cos²x + cosx − 2 = 0
⇒ 6cos²x + 4 cosx − 3 cosx − 2 = 0
⇒ 2cosx (3.cosx + 2) − 1(3 cosx + 2) = 0
⇒ (3cosx + 2)(2cosx − 1) = 0
⇒ cosx = 1/2 or cos x = −2/3
⇒ x = 60°

 1800 ÷ 20 × {(12 – 6) + (24 – 12)}

 = 1800 ÷ 20 × {18}

 = 

• Liquefaction of gases is the process by which substances of gaseous state are changed into liquid state.

• Liquefaction is also done by compressing the gases at temperatures less than its critical temperature.

• E.g.: Liquid oxygen is provided to hospitals for patients with breathing problems.

*  Novak Djokovic (Serbia) won the 2021 Australian Open Men's Singles tennis title.

* In the final, he defeated Daniil Medvedev (Russia).

* He has won 18 Grand Slam men's singles titles 

• Formation of new states and alteration of areas, boundaries or names of existing states does not require consent of states rather it is done by a simple majority of Parliament.

• The subjects for amending those there requires consent of at least half of states are-

o Election of President

o Representation of States in Parliament

o Supreme courts and high courts

o Extent of executive powers of states and centre

o Distribution of legislative powers between states and centre

o Any of the lists in the seventh schedule

* The sculpture of Yaksha and Yakshi are famous Mauryan Period sculptures.

* They were objects of worship related to all three religions – Jainism, Hinduism and Buddhism.

* In tamil text Shilapadikam the earliest mention of these sculptures is found.