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
Drug of choice for paroxysmal supraventricular tachycardia (PSVT) is: 
Select and explain. 
A. Verapamil, B. Digitalis, C. Quinidine, D. Diphenylhydantoin
A: Verapamil
Answer: A: Verapamil 
Explanation: None