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': 'Indication for sympathectomy is all Except \nSelect and explain. \nA. Intermittent claudication, B. Ischemic pain, C. Rest pain, D. Buerger disease', 'role': 'user'}, {'content': "Answer: A \nExplanation: Indications of sympathectomy (BARA CHEF) Buerger's disease Atherosclerosis producing ischemia of limbs Raynaud's disease Acrocyanosis Erythrocyanosis Frost bite Hyperhydrosis Peripheral vascular insufficiency Causalgia Ref: Sabiston 20th edition Pgno :1780", 'role': 'assistant'}]