This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ECG and Arrhythmias 1, Subject name: Medicine
What is the best drug for the following rhythm disorder shown below? 
Select and explain. 
A. Esmolol, B. Amiodarone, C. Vernakalant, D. Lignocaine
B: Amiodarone
Answer: B: Amiodarone 
Explanation: The video shows Atrial flutter with a 4:1 block with normal hea rate. To stabilize the macro-reentrant circuit, for rhythm control amiodarone is used. Amiodarone acts on multilple channels and pathways:- Na channel blocker K+ channel blocker Ca+ channel blocker b-blocker propey