This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Pharmacology
[{'content': 'A schizophrenic patient started on haloperidol 2 days back, comes with complaints of torticollis and orofaciolingual movements. What is the diagnosis? \nSelect and explain. \nA. Acute dystonia, B. Tardive dyskinesia, C. Parkinsonism, D. Akathisia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (A) Acute dystonia(Ref: Katzung 11/e p497; KDT 8/e p471)Dystonias are brief or prolonged contractions of muscles that result in obviously abnormal movements or postures, including oculogyric crises, tongue protrusion, trismus, torticollis, laryngeal-pharyngeal dystonias, and dystonic postures of the limbs and trunk. These are earliest appearing extrapyramidal symptoms with antipsychotic drugs.', 'role': 'assistant'}]