The correct answer is LH stimulates interstitial cells of the testes to produce testosterone.
Luteinizing hormone (LH) is a pituitary hormone with the influence on both, male and female reproductive system, regulated by gonadotropin-releasing hormone (GnRH). In males, LH acts upon the interstitial cells of the testis, which produce testosterone. LH regulates the expression of the enzyme that is used to convert the precursor of the testosterone to testosterone.
