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
Class III antiarrhythmic agents are all except ? 
Select and explain. 
A. Sotalol, B. Amiodarone, C. Verapamil, D. Bretylium
C: Verapamil
Answer: C: Verapamil 
Explanation: 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.