Pineal gland secretes which hormones I. Serotonin II. ACTH III. MSH IV. PRL V. Melatonin VI. FSH The correct option is
a)	I and II	b)	III and IV	c)	V and VI	d)	I and V

(d)

Pineal gland secretes two biogenic hormones i.e., melatonin and serotonin. Melatonin is secreted in a diurnal cycle (the amount changes throughout 24 hour period) where the amount remains low during daylight hours but increases during dark hours.

Serotonin

Serotonin secretion is induced by light. It act as vasoconstrictor and helps to increase the blood pressure