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
Which of the following drugs can cause Torsades de pointes ? 
Select and explain. 
A. Quinidine, B. Lignocaine, C. Esmolol, D. Flecainide
A: Quinidine
Answer: A: Quinidine 
Explanation: Ans. is 'a' i.e., Quinidine