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': 'Function of hypothalamus is \nSelect and explain. \nA. Alone or only organ which controls, circadian rhythm, B. Involved in thirst and water control, C. Involved in motor function, D. Related with sexual behaviour in animals', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (B) Involved in thirst and water control > Suprachiasmatic nuclei of hypothalamus and pineal gland have role in controlling circadian rhythm in mammals,> Motor activity is controlled by motor cortex and cerebellum,> Sexual behavior in animal is controlled by Amygdala> Hypothalamus has well documented role in water and thirst control (supra optic nucleus)', 'role': 'assistant'}]