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Assertion: A man gets completely exhausted in trying to push a stationary wall.

Reason: Work done by the man on the wall is zero.

A) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

B) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.

C) If Assertion is correct but Reason is incorrect.

D) If Assertion is incorrect but Reason is correct.