This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vascular surgery, Subject name: Surgery
[{'content': 'The Hunterian Ligature operation is performed for \nSelect and explain. \nA. Aneurysm, B. Varicose veins, C. A V fistulas, D. Acute aerial ischemia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: . Ans : (a) Aneurysm Hunterian ligature is a method of treatment of aneurysms, the parent aery is ligated on the proximal side of aneurysm above the first collateral.', 'role': 'assistant'}]