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': 'Class III antiarrhythmic agents are all except ? \nSelect and explain. \nA. Sotalol, B. Amiodarone, C. Verapamil, D. Bretylium', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Verapamil o Class III antiarrhythmics are amiodarone, bretylium, dofetilie, Ibutilide.o Sotalol also posses class III activity.o Calcium channel blockers (verapamil) have class IV activity.", 'role': 'assistant'}]