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
[{'content': 'Arrhythmias refractory to the treatment of lignocaine can be treated by: \nSelect and explain. \nA. Sotalol, B. Diltiazem, C. Amiodarone, D. Quinidine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]