This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pharmacology
Which of the following antiarrhythmic drugs can develop Long QT syndrome? 
Select and explain. 
A. Ibutilide, B. Dofetilide, C. Sotalol, D. All the above
D: All the above
Answer: D: All the above 
Explanation: Ans. is 'd' i.e., All the above Proarrhythmic Manifestations of Most Frequently Used Antiarrhythmic AgentsDrugCommon Proarrhythmic ToxicityAmiodarroneSinus bradycardia, AV block, increase in defibrillation thresholdRare: long QT and torsades des pointes,1:1 ventricular conduction with atrial flutterAdenosineAll arrhythmias potentiated by profound pauses, atrial fibrillationDigoxinHigh - grade AV block, fascicular tachycardia, accelerated junctional rhythm, atrial tachycardiaDisopyramideLong QT and torsades des pointes, 1:1 ventricular responses to atrial flutter; increased risk of some ventricular tachycardias in patients with structural heart diseaseDofetilideLong QT and torsades des pointesDronedaroneBradyrrhythmias and AV block, long QT and torsades des pointesFlecainides1:1 Ventricular response to atrial fluter; increased risk of some ventricular tachycardias in patients with structural heart disease; sinus bradycardiaIbutilideLong QT and torsades des pointesProcainamideLong QT and torsades des pintes 1:1 ventricular response to atrial fluter; increased risk of some ventricular tachycardias in patients with structural heart diseasePropafenone1:1 Ventricular response to atrial flutter; increased risk of some ventricular tachycardias in patients with structural heart disease; sinus bradycardiaQuinidineLong QT and torsades des pointes, 1:1 ventricular response to atrial flutter; increased risk of some ventricular tachycardias in patients with structural heart diseaseSotalolLong QT amd tprsades des pointes, sinus bradycardia