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: Psychiatry
[{'content': 'Narcolepsy is due to abnormality in ? \nSelect and explain. \nA. Hypothalamus, B. Neocoex, C. Cerebellum, D. Medulla oblongata', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. HypothalamusNarcolepsy is unique in that those who suffer from it tyPicaly fall almost instantaneously into REM sleep.It is thought that narcolepsy is caused by a malfunctioning of the hypothalamus in brain.', 'role': 'assistant'}]