This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Physiology
[{'content': 'Function of oxytocin \nSelect and explain. \nA. Milk ejection, B. Milk secretion, C. Ovulation, D. Maintenance of pregnancy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Oxytocin - a hypothalamic hormone stored in and released from the posterior pituitary; it may also be prepared synthetically or obtained from the posterior pituitary of domestic animals. It acts as a powerful stimulant to the pregnant uterus, especially toward the end of gestation, and also causes milk to be expressed from the alveoli into the lactiferous ducts during breastfeeding.Ref: Ganong&;s review of medical physiology;24th edition; page no:-311', 'role': 'assistant'}]