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
Part of hypothalamus which is involved in sexual behavior: 
Select and explain. 
A. Preoptic area, B. Supraoptic area, C. Hypothalamus, D. Posterior hypothalamus
A: Preoptic area
Answer: A: Preoptic area 
Explanation: Ans. A. Preoptic areaThe most anterior (medial preoptic area is main) portions of the hypothalamus.Although most posterior nucleus also has some role.