The correct option is C Testosterone
Ductless glands or endocrine glands secrete chemicals called hormones, which control and coordinate all the life processes. The endocrine gland in the male reproductive system is testes. It secretes the male hormone called testosterone. Oestrogen and progesterone are female sex hormones. Prolactin is the hormone which is used to make breast milk when a female is pregnant or breast-feeding. Production of prolactin takes place in the pituitary gland.