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': "Lumbar sympathectomy is not indicated in ? \nSelect and explain. \nA. Healing of ulcer over great toe, B. Claudication, C. Rest pain, D. Buerger's disease", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans is 'b' ie Claudication", 'role': 'assistant'}]