The correct option is C testosterone
GnRH is produced from the hypothalamus in both males and females. It acts on the anterior pituitary and stimulates the release of FSH (follicle stimulating hormone) and LH (luteinising hormone).
FSH and LH are gonadotropins that are concerned with the growth and activity of gonads in both males and females.
Male contraceptive pills contain testosterone or a combination of testosterone and progesterone.
Testosterone functions as a contraceptive by suppressing secretion of the luteinising hormone and follicle stimulating hormone. Decrease in the levels of these hormones inhibits the production of sperms in the testis.
Estrogen is primarily responsible for the development of secondary sexual characters in females.