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': 'Features like increased psychomotor activity, waxy flexibility at time are seen classically in - \nSelect and explain. \nA. Simple schizophrenia, B. Hebephrenic schizophrenia, C. Catatonic schizophrenia, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]