The correct option is D Prolactin - ejection of milk from mammary glands
Prolactin, released by the anterior pituitary, regulates the growth of the mammary glands and formation of milk in them. Ejection of milk from mammary glands is the function of the oxytocin hormone, which is released by the posterior pituitary.
Thyroid hormones released by the thyroid gland play an important role in the regulation of the basal metabolic rate.
FSH (follicle stimulating hormone) is released by the anterior pituitary and has a role in regulating spermatogenesis (production of sperms) in males.
Vasopressin, secreted by the posterior pituitary, is responsible for reducing the loss of water from the body. It causes reabsorption of water and electrolytes by the distal tubules of the kidney.