This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sleep disorders and eating disorders, Subject name: Psychiatry
[{'content': 'Not true about narcolepsy \nSelect and explain. \nA. Sudden sleep attack, B. Long duration (>3 hrs) of sleep, C. Cataplexy, D. Presents in 2nd decade', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Classic form of Narcolepsy is characterised by Tetrad of symptoms- excessive day time sleepiness, cataplexsy, sleep paralysis and hypnogogic hallucinations. Sleep attacks leads to 10 to 20 minutes of sleep, after which patient feels refreshed, at least briefly. Ref: Synopsis of Psychiatry, 11e, pg 547.', 'role': 'assistant'}]