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': 'Which of the following disorders is not seen in the "REM" stage of sleep? \nSelect and explain. \nA. Nightmares, B. Narcolepsy, C. Somnambulism, D. Sleep apnea', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C. SomnambulismSlow wave sleep disordersa. Night terror/pavor nocturnusb. Somnambulismc. Somniloquyd. Bruxisme. Nocturnal enuresisREM (desynchronized sleep/paradoxical sleep disorder)a. Nightmaresb. Narcolepsyc. Insomniad. Sleep apnea', 'role': 'assistant'}]