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
Antiarrhythmic drugs causing torsades de pointes are: 
Select and explain. 
A. Quinidine, B. Disopyramide, C. Procainamide, D. All of these
D: All of these
Answer: D: All of these 
Explanation: None