This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Physiology
[{'content': 'Part of hypothalamus which is involved in sexual behavior: \nSelect and explain. \nA. Preoptic area, B. Supraoptic area, C. Hypothalamus, D. Posterior hypothalamus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. Preoptic areaThe most anterior (medial preoptic area is main) portions of the hypothalamus.Although most posterior nucleus also has some role.', 'role': 'assistant'}]