This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti-Arrhythmic, Subject name: Pharmacology
[{'content': 'A patient develops Condition {Arrowr} intra-oper- atively. DOC is \nSelect and explain. \nA. Propanolol, B. Adrenaline, C. Hyoscine, D. Neostigmine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Propanolol (Condition shown: Intraoperative tachycardia)', 'role': 'assistant'}]