Assertion (A): CFCs deplete the ozone layer.
Reason (R): CFCs are used as refrigerants and in fire extinguishers.
Answer:
Chlorofluorocarbons (CFCs ), which are used as refrigerants and in fire extinguishers , deplete the ozone layer by rising into the stratosphere and releasing chlorine atoms which react with ozone.
Thus,
- Assertion is true.
- Reason is true.
- Reason is the correct explanation of assertion.
So, the correct answer is (a).