This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': 'Pa of brain involved in narcolepsy \nSelect and explain. \nA. Neocoex, B. Hypothalamus, C. Cerebellum, D. Putamen', 'role': 'user'}, {'content': "Answer: B \nExplanation: Harrison's principles of internal medicine 17th edition *Recently several convergent lines of evidence suggest that hypothalamic neuropeptide hypocretin(orexin) is involved in the pathogenesis of narcolepsy.", 'role': 'assistant'}]