This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Aerial disorders, Subject name: Surgery
[{'content': 'Pressure on aery proximal to fistula leading to diminished swelling is known as: \nSelect and explain. \nA. Murray sign, B. Frei sign, C. Darrier sign, D. Branham sign', 'role': 'user'}, {'content': "Answer: D \nExplanation: Nicoladoni's or Branham's sign: Pressure on aery proximal to fistula causes the swelling to diminish in size, a thrill or bruit to cease, the pulse rate to fall and the pulse pressure returns to normal.", 'role': 'assistant'}]