Q. Consider the following statements:
1.Gravitational lensing is a technique used to study the changing electromagnetism of the Earth.
2.Supercomputer simulations are used to confirm the size of the black hole.
Select the correct statements using the codes given below:

[A] 1 only

[B] 2 only

[C] Both 1 and 2

[D] Neither 1 nor 2

Answer: B
Notes:

Explanation –

Statement 1 is incorrect.  Gravitational lensing is a technique used to closely examine how light is bent by a black hole inside a galaxy hundreds of millions of light-years from Earth.

Statement 2 is correct. Supercomputer simulations are used to confirm the size of the black hole.

Source: ForumIAS