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': 'Paroxysmal supra ventricular tachycardia responds to: \nSelect and explain. \nA. IV verapamil, B. Valsalva manoeuvre, C. Carotid sinus massage, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans: dRef: Harrison, 16thed, p. 1347- 1348', 'role': 'assistant'}]