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: Medicine
[{'content': 'Asynchronous cadioversion is given in: \nSelect and explain. \nA. AF, B. Ventricular fibrillation, C. Atrial flutter, D. Ventricular tachycardia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Ventricular fibrillation) Asynchronous cardioversion is ito ino.st reliable method for terminating V.F. Electrical cardioversion and defibrillation are the most reliable methods for termination of arrhythmias. These methods depolarize all or at least a large poion of excitable myocardium in a near homogenous fashion. Thereby interrupting reequitant rhythms.', 'role': 'assistant'}]