What hormone stimulates the secretion of LH?

a. testosterone

b. estrogen

c. progesterone

d. GnRH

The correct answer will be option-D.

Explanation:

Luteinizing hormone or LH is a hormone co-secreted with the FSH in the gonadotrophin cells of the anterior pituitary of the endocrine system in the brain.

The chemical nature of LH is a glycoprotein which is secreted in response to the gonadotropin-releasing hormone (GnRH) pulses and frequency. The LH secretion is controlled by the feedback mechanism as it is inhibited by the estrogen in females and testosterone in males. The LH in males stimulates the release of testosterone in males and estrogen in females.

Thus, option-D is the correct answer.