<prompt> Verapamil belongs to which class of the anti - arrhythmic drugs?Class IVClass IaClass IbClass Ic  <response>: Ans. is a i.e., Class IV Verapamil A calcium channal blockers belongs to Class IV antiarrhythmic drugs.AntiarrhythmicsClass IA Quinidine, Procainamide, Disopyramide, MoricizineBoth ventricular and suproventricular atrialClass IB Lidocaine, mexiletine, PhenytoinVentricularClass IC Propofenon, flecanide, encanideBoth ventricular and suproventicular atrialClass II Beta blockersBoth ventricular and supraventricular atrialClass III Amiodarone, bretylium, Ibutilide, dofetilideBoth ventricular and supraventricular atrialClass IV calcium channel blockersSupraventricular atrialMiscellaneous DigoxinSupraventricular atrial AdenosineSupraventricular atrial 