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
[{'content': 'Drug of choice in PSVT is- \nSelect and explain. \nA. Amaidarone, B. Lingnocaine, C. Quinidine, D. Adenosine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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', 'role': 'assistant'}]