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Question : Assertion : In crustose lichenstage , by corroding action , soil formation occurs but this action is very slow. Reason : Crustose lichens produce carbonic acid which corrodes the rock.

Answer»

If both ASSERTION and REASON are TRUE and Reason is CORRECT EXPLANATION of Assertion.
If both Assertion and Reason is not correct explanation of Assertion.
If Assertion is true but Reason is false.
If both Assertion and Reason are false.

Answer :A


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