This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'Catatonia is characterized by all except NOT RELATED-PSYCHIATRY \nSelect and explain. \nA. Echolalia, B. Grandiosity, C. Mutism, D. Abnormal posturing', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Catatonia is characterized by marked disturbance of motor behavior presents in 3 clinical forms.a) Excited catatoniab) Stuporous catatoniac) Catatonia alternating between excitement & stupor.', 'role': 'assistant'}]