Ncert Exercises & Solutions

Given below are two statements:

Assertion (A):	Ozone is destroyed by solar radiation in the upper stratosphere.
Reason (R):	Thinning of the ozone layer allows excessive UV radiations to reach the surface of the earth.

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	(A) is false but (R) is true.