Assertion : From evolutionary point of view, human gestation period is believed to be shortening.
Reason : One major evolutionary trend in humans has been the larger head undergoing relatively faster growth rate in the foetal stage.

Options

A. Both Assertion and Reason are true, but Reason is the correct explanation of Assertion
B. Both Assertion and Reason are true, but Reason is not the correct explanation of Asseration
C. Assertion is true, but Reason is false
D. Both Asseration and Reason are false

Answer

D

Explanation

The human would require more getation period (should have been 21 months as compared to 9 months and will increase ). Similarly , the head size is increasing (especially the frontal brain) , hence growth rate needs to increase , but surprisingly , most of the brain growth occurs after birth till two years (when the anterior fotanellac close at 18 months ) and some till 30 years when finally the cranial structures close
Thus, an increase in brain/skull size would require increase in gestation period