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': 'Mutism is a recognised feature of : \nSelect and explain. \nA. Ganser states, B. Conversion hysteria, C. Catatonic Schizophrenia, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: > A. i.e. Ganser state; B. i.e. Conversion hysteria; C. i.e. Catatonic schizophrenia', 'role': 'assistant'}]