The correct option is A Leydig cells
GnRH or the Gonadotropin Releasing Hormone secreted by the hypothalamus, stimulates the pituitary to form
1. Leutinising hormone (LH)
2. Follicle Stimulating Hormone (FSH)
LH is called Interstitial cell stimulating Hormones (ICSH) in males. It acts on the Leydig cells and stimulates the production of androgens which in turn stimulate spermatogenesis.