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': 'In narcolepsy, the polysomnographic recording typically shows which of the following patterns? \nSelect and explain. \nA. REM intrusion during inappropriate periods, B. An absence of REM sleep in midcycle, C. Spike-and-wave EEG recording, D. Extreme muscular relaxation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: REM intrusion during inappropriate periods', 'role': 'assistant'}]