This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Arrhythmias, Subject name: Medicine
Drug of choice for paroxysmal supraventricular tachycardia is? 
Select and explain. 
A. Metoproloi, B. Amiodarone, C. Adenosine, D. Lidocaine
C: Adenosine
Answer: C: Adenosine 
Explanation: ANSWER: (C) AdenosineREF: Harrison's Principles of Internal Medicine 17th ed chapter 226See APPENDIX-40 for "DRUGS USED IN ARRHYTHMIAS" DoseIndicationSide effectsAdenosine6-18 mg (rapid bolus)Terminate reentrant SVT involving AV nodeCough, flushingSVT - SUPRA VENTRICULAR TACHYCARDIA