Correct Answer: Oxytocin

Solution : The correct answer is oxytocin.

Hormones are the chemical which are released in blood in small quantities and carry messages to the target organs. They control various vital body functions. Various hormones are protein based like oxytocin, insulin, somatotropin, glucagon, insulin, parathyroid hormone etc. Insulin and glucagon are the blood sugar regulating hormone. Oxytocin stimulates uterine contractions and milk secretion and is released from the pituitary gland.