This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mood disorders, Subject name: Psychiatry
[{'content': 'Reduced latency of REM sleep is a feature of \nSelect and explain. \nA. Schizophrenia, B. Depression, C. Insomnia, D. Narcolepsy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Reduced latency of REM is typically seen in depression Insomnia and early morning wakening is also seen Ref: Essentials of postgraduate psychiatry By JN Vyas 1st ed Pg 604-607', 'role': 'assistant'}]