What is the function of androgen?

The correct answer is Option (2) → Stimulate spermatogenesis.

Androgens are the male hormones made by the Leydig cells (interstitial cells) of the testis. Their release is controlled by hormones: GnRH from the hypothalamus causes LH release, and LH makes the Leydig cells secrete androgens. The androgens then stimulate spermatogenesis, the formation of sperms.

Option (1) Stimulate oogenesis. — Incorrect. Oogenesis is the formation of the ovum in the ovary of the female. Androgens are testicular hormones and act on sperm formation.

Option (2) Stimulate spermatogenesis. — Correct. Androgens stimulate the process of spermatogenesis in the seminiferous tubules.

Option (3) Provide nutrition. — Incorrect. Nutrition to the germ cells is provided by the Sertoli cells of the seminiferous tubules, not by androgens.

NCERT Extract:
Gametogenesis – “… The increased levels of GnRH then acts at the anterior pituitary gland and stimulates secretion of two gonadotropins – luteinising hormone (LH) and follicle stimulating hormone (FSH). LH acts at the Leydig cells and stimulates synthesis and secretion of androgens. Androgens, in turn, stimulate the process of spermatogenesis.”