This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
Drug of choice for maintenance in PSVT is 
Select and explain. 
A. Amiodarone, B. Lignocaine, C. Verapamil, D. Adenosine
D: Adenosine
Answer: D: Adenosine 
Explanation: Adesosine (3-12mg rapidly IV in incremental doses until tachycardia stops) or verapamil(5mg IV over 1min) will restore sinus rhythm in most cases. Reference : Harrison 20th edition pg 1432