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
Arrhythmias refractory to the treatment of lignocaine can be treated by: 
Select and explain. 
A. Sotalol, B. Diltiazem, C. Amiodarone, D. Quinidine
C: Amiodarone
Answer: C: Amiodarone 
Explanation: None