This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
[{'content': 'Drug of choice for acute PSVT \nSelect and explain. \nA. Esmolol, B. Adenosine, C. Digoxin, D. Verapamil', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Adenosine is used for acute termination of PSVT Verapamil and esmolol are used as an alternate 2nd choice of drugsRef: Katzung 11th ed pg 243', 'role': 'assistant'}]