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: Pediatrics
What is the drug of choice to control supraventricular tachycardia? 
Select and explain. 
A. Adenosine, B. Propranolol, C. Verapamil, D. Digoxin
A: Adenosine
Answer: A: Adenosine 
Explanation: a. Adenosine(Ref: Nelson's 20/e p 2282-2287, Ghai 8/e p 396-400)In stable patients with Supraventricular Tachycardia, Adenosine by rapid IV push is the treatment of choice because of its rapid onset of action and minimal effects on cardiac contractility.