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: Physiology
[{'content': 'About paradoxical sleep. True is: \nSelect and explain. \nA. Prominent beta waves, B. Prominent alpha waves, C. Also known as NREM sleep, D. Low amplitude, mixed frequency waves.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Low amplitude, mixed frequency wave', 'role': 'assistant'}]