This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
Lignocaine is useful for the treatment of : 
Select and explain. 
A. Atrial fibrillation, B. Paroxysmal supraventricular tachycardia, C. Digitalis induced ventricular extrasystoles, D. All of the above
C: Digitalis induced ventricular extrasystoles
Answer: C: Digitalis induced ventricular extrasystoles 
Explanation: (Ref: KDT 6/e p502) Lignocaine is used only for the treatment of ventricular arrhythmias, it has no role in atrial arrhythmia.