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: Radiology
[{'content': 'Radiofrequency ablation treatment is most useful in: \nSelect and explain. \nA. Ventricular fibrillation, B. Atrial fibrillation, C. WPW syndrome, D. Ventricular premature complex', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. WPW syndrome', 'role': 'assistant'}]