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': 'A patient of schizophrenia treated for 5 years developed perioral movements. Likely diagnosis is - \nSelect and explain. \nA. Tardive dyskinesia, B. Muscular dystonia, C. Akathas i a, D. Malignant neurolept syndrome', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Perioral movement after antipsychotic therapy occurs in two syndromes:-\n\n\nTardive dyskinesia → Facial muscles (perioral muscles) show involuntary movement.\nRabbit syndrome → Perioral tremor.\n\n\nPerioral muscles are also involved in acute dystonia, but there is a spasm of muscles (not movement) and it occurs within a week after initiation of the drug.', 'role': 'assistant'}]