Assertion: Excess of ozone in troposphere called bad ozone while excess in stratosphere is known as "good" ozone.
Reason: In troposphere ozone acts as pollutant while in stratosphere it protects from U.V. radiations.
A. If both Assertion `&` Reason are True `&` the Reason is a correct explanation of the Assertion.
B. If both Assertion `&` Reason are True but Reason is not a correct explanation of the Assertion
C. If Assertion is True but the Reason if False.
D. If both Assertion `&` Reason are false.