Given below are two statements, one labelled as Assertion (A) and the other as Reason (R). In the light of the above statements, choose the correct answer from the options given below.
Assertion (A):Despite the fact that chlorofluorocarbons (CFCs) are evenly distributed over the globe, ozone depletion is significantly pronounced over the south pole.
Reason (R):The presence of ice crystals over the south pole makes chlorine-to-oxygen bonding tougher.
ABoth A and R are correct and R is the correct explanation of A
BBoth A and R are correct but R is not the correct explanation of A
CA is correct but R is not correct ✓ Correct
DA is not correct but R is correct
Correct answer: (C) A is correct but R is not correct
Explanation
The assertion is correct, as ozone loss is sharpest over the south pole despite even CFC spread.
The reason is not correct, because polar ice crystals actually promote, not hinder, chlorine driven ozone destruction.
Very cold Antarctic winters form polar stratospheric clouds of ice crystals.
Their surfaces convert stored chlorine into reactive forms that attack ozone.
When spring sunlight returns, this activated chlorine drives the seasonal ozone hole.
This is why the ozone hole appears each Antarctic spring above the south pole.
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