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': 'The condition known as REM sleep is - \nSelect and explain. \nA. That point at which the, B. Indivudual becomes aware and ale., C. Referred to as paradoxical sleep., D. Characterized by total lack of all muscular activity', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Referred to as paradoxical sleep', 'role': 'assistant'}]