Assertion :From evolutionary point of view, human gestation period is shortening. Reason: A major trend in humans has been larger head undergoing faster growth in foetal stages.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The time of the gestation period depends upon the size of the head. If the head becomes too large it would be harder for the females to give birth to the fetus because of the size of the head. The width of the pelvic bone is less which makes it difficult to give birth to larger babies.
As the human head is undergoing a faster development in the fetal stages the gestation period will be shorter because it would be hard to expel the fetus with a large head.

So, the correct option is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'

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