If mammalian ovum fails to get fertilised, which one of the following is unlikely?

Options

A. Corpus luteum will disintegrate
B. progestrone secretion rapidly declines
C. estrogen secretion increases
D. primary follicle starts developing

Answer

C

Explanation

If ovum fails to get fertilised, then corpus luteum (source of progesterone and estrogen) will disintegrate resulting in decrease in the level of progesterone and estrogen. Thus. Endometrial lining of the uterus sloughs off and menstruation begins, marking a new cycle.