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
Which one of the following is not a symptom of atherosclerotic occlusive disease at the bifurcation of aorta (Lehriche syndrome)? 
Select and explain. 
A. Claudication of buttock and thigh, B. Claudication of the calf, C. Sexual impotence, D. Gangrene localized to the feet
D: Gangrene localized to the feet
Answer: D: Gangrene localized to the feet 
Explanation: None