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: Surgery
[{'content': "Nicoladini's Branham sign is seen in \nSelect and explain. \nA. Aortic dissection, B. Buerger's disease, C. Aneurysm, D. AV - Fistula", 'role': 'user'}, {'content': "Answer: D \nExplanation: Nicoladini's Branham sign is seen in arteriovenous fistula, wherein compression proximal to AV - fistula results in bradycardia.", 'role': 'assistant'}]