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
Desynchronised defibrillation is used in - 
Select and explain. 
A. Atrial fibrillation, B. Attial flutter, C. SVT, D. Ventricular fibrillation
D: Ventricular fibrillation
Answer: D: Ventricular fibrillation 
Explanation: None