This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
A drug used for ventricular arrhythmias caused by digoxin? 
Select and explain. 
A. Verapamil, B. Diltiazem, C. quinidine, D. Phenytoin
D: Phenytoin
Answer: D: Phenytoin 
Explanation: Ventricular arrhythmias caused by digoxin are best treated with lidocaine, followed by phenytoin-class 1 antiarhhmatics REF Essentials of Medical Pharmacology KD Tripathi 8th ed.