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
Intermittent claudication is caused by ? 
Select and explain. 
A. Venous occlusion, B. Aerial insufficiency, C. Neural compression, D. Muscular dystrophy
B: Aerial insufficiency
Answer: B: Aerial insufficiency 
Explanation: Ans. is 'b' i.e., Aerial insufficiency