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': 'Patient presents with waxy flexibility, negativism & rigidity Diagnosis is? \nSelect and explain. \nA. Paranoid schizophrenia, B. Catatonic schizophrenia, C. Hebephrenic Sch, D. Simple Sch.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Catatonic schizophrenia', 'role': 'assistant'}]