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Question

Assertion :DDT shows biological magnification. Reason: UV radiation causes ozone depletion.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is C Assertion is correct but Reason is incorrect
DDT is a non-biodegradable, fat soluble pollutant. Being fat soluble, it accumulates in the animal tissues, enters the food chain and gets concentrated thus, shows biological magnification.
Ozone layer is present in the troposphere and protects us from harmful UV rays of sun. Oxides of nitrogen and CFCs cause ozone depletion. Thus the correct answer is option C.

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