This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
An 8–month–old female child presented to emergency with a heart rate of 220/minute and features of congestive heart failure. Her heart rate comes down to normal after administering intravenous adenosine. What is the most likely diagnosis ? 
Select and explain. 
A. Atrial fibrillation, B. Atrial flutter, C. Paroxysmal supraventricular tachycardia, D. Ventricular tachycardia
C: Paroxysmal supraventricular tachycardia
Answer: C: Paroxysmal supraventricular tachycardia 
Explanation: Adenosine is the DOS for PSVT.