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': 'Akinesia (hypoactivity) and mutism is a feature of \nSelect and explain. \nA. Twillight state, B. Stupor, C. Cataplexy, D. Torpor', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Akinesia + Mutism is a feature of stupor, which is seen in catatonic schizophrenia or catalepsy.\nOption c :\xa0Cataplexy is sudden loss of muscle tone seen in Norcolepsy, which is not a correct answer.', 'role': 'assistant'}]