GnRH is secreted by:

The correct answer is Option (2) → Hypothalamus

Option (1) Pituitary gland — Incorrect. The anterior pituitary is where GnRH acts, not where it is made. In answer to GnRH, the pituitary releases the gonadotropins LH and FSH.

Option (2) Hypothalamus — Correct. GnRH (gonadotropin releasing hormone) is a hypothalamic hormone. It is released by the hypothalamus of the brain and acts on the anterior pituitary, which then releases LH and FSH.

Option (3) Testis — Incorrect. The Leydig cells of the testis secrete androgens such as testosterone, under the control of LH. The testis does not make GnRH.

Option (4) Ovary — Incorrect. The ovary secretes the female hormones estrogen and progesterone. It receives signals from the pituitary but does not make GnRH.

NCERT Extract:
Gametogenesis – …