1.

Assertion (A) : DDT as an insecticide is still being used worldwide on a large scale as a safe treatment. Reason (R) : Carbon tetrachloride has been found to be responsible for depletion of ozone layer.

Answer»

Both ASSERTION (A) and Rersou (R) are CORRECT STATEMENTS, and Reason (R) is the correct explanation of the Assertion (A).
Both Assertion (A) and RENSON (R) are correct statements, but Renson (R) is not the correct explanation of the Assertion (A).
Assertion (A) is correct, but Renson (R) is incorrect statement.
Assertion (A) is incorrect, but Reason (R) is correct statement.

ANSWER :d


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