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
The antiarrhythmic drug having effectiveness in a wide range of ventricular as well as supra–ventricular arrhythmias and acting mainly by prolongation of action potential is: 
Select and explain. 
A. Quinidine, B. Amiodarone, C. Lignocaine, D. Tocainide
B: Amiodarone
Answer: B: Amiodarone 
Explanation: None