This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pharmacology
The drug of choice in digitalis induced ventricular arrhythmias is: 
Select and explain. 
A. I.V. Lignocaine, B. Phenytoin, C. Quinidine, D. Procainamide
A: I.V. Lignocaine
Answer: A: I.V. Lignocaine 
Explanation: (IV Lignocaine): Ref: 463-KDT (514-KDT 6th)Treatment of digitalis induced ventricular arrhythmias* Lignocaine IV repeated as required is the drug of choice. It suppresses the excessive automaticity but does not accentuate A V block* Phenytoin is also useful but not preffered now (sudden death occurs)* Quinidine and procainamide are contraindicated.