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 30-year-old man who was recently staed on haloperidol 30mg/day developed hyperpyrexia, muscle rigidity, akinesia, mutism, sweating, tachycardia and increased blood pressure. The investigations showed increased VVBC count, increased creatinine phosphokinase. There is no history of any other drug intake or any signs of infection. The most likely diagnosis is: \nSelect and explain. \nA. Drug overdose, B. Neuroleptic malignant syndrome, C. Drug induce Parkinsonism, D. Tardive dyskinesia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Neuroleptic malignant syndrome', 'role': 'assistant'}]