This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vascular surgery, Subject name: Surgery
[{'content': 'Which one of the following is not a symptom of atherosclerotic occlusive disease at the bifurcation of aoa (Leriche syndrome)? \nSelect and explain. \nA. Claudication of the buttock and thigh, B. Claudication of the calf, C. Sexual impotence, D. Gangrene localized to the feet', 'role': 'user'}, {'content': 'Answer: D \nExplanation: . Ans : (d) Gangrene localised to feet In chronic atherosclerotic occlusive disease usually it is confined to distal abdominal aoa below the renal aeries. Frequently extends to iliac aeries . Claudication characteristically involves buttocks , thighs and calves & may associated with impotence in males (Leriche syndrome ) .', 'role': 'assistant'}]