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 31 year old male, with mood disorder, on 30 mg of haloperidol and 100 mg of lithium, is brought to the hospital emergency room with history of acute onset of fever, excessive sweating, confusion, rigidity of limbs and decreased communication for a day. Examination reveals tachycardia and labile blood pressure and investigations reveal increased CPK enzyme levels and lecocytosis. He is likely to have developed. \nSelect and explain. \nA. Lithium toxicity, B. Tardive dyskinesia, C. Neuroleptic malignant syndrome, D. Hypeensive encephalopathy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Neuroleptic malignant syndrome', 'role': 'assistant'}]