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 sixteen–year–old girl is found to have paroxysmal attacks of rapid heart rate. The antiarrhythmic of choice in most cases of acute AV nodal tachycardia is: \nSelect and explain. \nA. Adenosine, B. Amiodarone, C. Propranolol, D. Quinidine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]