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': 'Most common vessel affected in acute Limb ischaemia is \nSelect and explain. \nA. Superficial femoral artery, B. Iliac artery, C. Popliteal artery, D. Tibial artery', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Superficial femoral artery is most commonly affected artery in acute Limb ischaemia.', 'role': 'assistant'}]