This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax And Mediastinum, Subject name: Surgery
[{'content': 'The Hunterian ligature operation is performed for: \nSelect and explain. \nA. Aneurysm, B. Varicose veins, C. AV fistulas, D. Acute aerial ischemia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: HUNTERIAN LIGATION Hunterian ligation refers to one of the oldest successful interventions for aerial aneurysms ligation of the femoral aery to treat popliteal aneurysm by john Hunter in 1785.', 'role': 'assistant'}]