Question

question 4 points 3 assertion (a): the ozone layer protects the earth from harmful ultraviolet radiation. reason (r): the ozone layer is composed of oxygen molecules. which of the following is true for the above statements? both (a) and (r) are true, but (r) is not the correct explanation of (a) both (a) and (r) are true, and (r) is the correct explanation of (a) (a) is false, but (r) is true (a) is true, but (r) is false

Explanation:

The ozone layer indeed protects Earth from harmful UV - radiation. But it is composed of ozone molecules ($O_3$), not just oxygen molecules ($O_2$). So assertion (A) is true and reason (R) is false.

Answer:

(A) is true, but (R) is false