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: Psychiatry
[{'content': 'Not true about nocturnal penile tumerscence is \nSelect and explain. \nA. Totals about 100 min / night, B. Normal phenomenon, C. Occurs in NREM sleep, D. Can be used to distinguish between psychological or organic impotence.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Sleep walking', 'role': 'assistant'}]