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': 'Deficiency of hypocretin leads to \nSelect and explain. \nA. Somnambulism, B. Bruxism, C. Narcolepsy, D. Restless leg symdrome', 'role': 'user'}, {'content': "Answer: C \nExplanation: Hypocretin is a neurotransmitter that promotes wakefulness and it's deficiency leads to Narcolepsy.", 'role': 'assistant'}]