This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sleep Disorders, Subject name: Psychiatry
[{'content': 'What is D - Sleep ? \nSelect and explain. \nA. NREM sleep, B. REM sleep, C. Deep sleep, D. Drug induced sleep', 'role': 'user'}, {'content': 'Answer: B \nExplanation: D - Sleep is the other name for Desynchronized sleep or the REM sleep. The alternative names for REM sleep are: Desynchronized sleep (D - Sleep) Dream sleep Active sleep Paradoxical sleep', 'role': 'assistant'}]