This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'Drug of choice for ventricular arrhythmias induced by bupivacaine \nSelect and explain. \nA. Bretylium tosylate, B. Lignocaine, C. Nifedipine, D. Verapamil', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Bupivacaine has got high cardiotoxic potential. Treatment for ventricular arrhythmia produced by bupivacaine is bretylium.', 'role': 'assistant'}]