Assertion (A) : Nitrogen and Oxygen are the main components of the atmosphere by volume. Together these two gases make up approximately 99% of the dry atmosphere.
Reason (R) : Both of these gases have very important associations with life.

Options

A. If (A) and (R) are correct and (R) is the correct explanation of (A)
B. IF (A) and (R) are correct but (R) is not the correct explanation of (A)
C. If (A) is true but (R) is false
D. If (A) is false but (R) is true

Answer

A

Explanation

If (A) and (R) are correct and (R) is the correct explanation of (A)