This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Posterior pa of hypothalamus is concerned with: March 2013 \nSelect and explain. \nA. Regulation of sexual function, B. Role in circadian rhythm, C. Regulation of response to smell, D. Secretion of posterior pituitary hormones', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C i.e. Regulation of response to smell', 'role': 'assistant'}]