This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
[{'content': 'All of the following drugs are Class I anti -arrhythmic drugs EXCEPT: \nSelect and explain. \nA. Quinidine, B. Procainamide, C. Flecainide, D. sotalol', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Quinidine and procainamide are class IA drugs, Flecainide is IB drug.propranolol is class II drug. beta blockers are class 2 agents except for sotatolol sotalol-class3 REF.Essentials of Pharmacology KD Tripathi 8th ed.', 'role': 'assistant'}]