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': 'Intermittent claudication is caused by ? \nSelect and explain. \nA. Venous occlusion, B. Aerial insufficiency, C. Neural compression, D. Muscular dystrophy', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Aerial insufficiency", 'role': 'assistant'}]