Assertion(A): From evolutionary point of view, human gestation period is believed to be shortening.
Reason(R): One major evolutionary trend in humans has been the larger head undergoing relatively faster growth in the foetal stage.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.