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: Pharmacology
[{'content': 'A 25 years old male started taking antipsychotic (haloperidol) for the last three days. He presented to the emergency department with protruded tongue, breathing difficulty along with spasm of neck and jaw muscles. What could be the most likely diagnosis: \nSelect and explain. \nA. Drug hypersensitivity reaction, B. Acute dystonia, C. Neuroleptic malignants, D. Tardive dystonia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]