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': 'Best used in digoxin induced arrhythmia- \nSelect and explain. \nA. Phenytoin, B. Lignocaine, C. Quinidine, D. Procainamide', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Lignocaine o Lignocaine is DOC for digitalis induced ventricular arrhythmias.o Phenytoin is an alternative.", 'role': 'assistant'}]