Hormone essential for milk ejection is:

Correct option is D

Ans. (d) Oxytocin
Sol. Oxytocin is the hormone responsible for the milk ejection (let-down) reflex, helping the milk to be released from the alveoli of the mammary glands to the nipple.
Explanation of each option:
· (a) Prolactin – Stimulates milk production, not ejection.
· (b) Estrogen – Supports breast development but not involved in ejection.
· (c) Progesterone – Maintains pregnancy, not related to milk ejection.
· (d) Oxytocin – Correct. Triggers milk ejection reflex.