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': "Boyd's classification is with regard to \nSelect and explain. \nA. Limb ischaemia, B. Arterial stenosis, C. Claudication, D. AV fistula", 'role': 'user'}, {'content': "Answer: B \nExplanation: Boyd's classification is with regard to claudication.", 'role': 'assistant'}]