This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
[{'content': 'intermittent claudication is seen when ankle brachial index is ? \nSelect and explain. \nA. 0.9-1, B. <0.3, C. 0.5-0.9, D. >1.1', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 0.5-0.9 = intermittent claudication ref : bailey and love 27th ed', 'role': 'assistant'}]