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 in PSVT is- 
Select and explain. 
A. Amaidarone, B. Lingnocaine, C. Quinidine, D. Adenosine
D: Adenosine
Answer: D: Adenosine 
Explanation: adenosine is the drug of choice in PSVT .verapamil is the next drug of choice Adenosine blocks AV node there by blocking reentry pathway Ref Harrison 20th edition pg 1445