This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Arterial Disorders, Subject name: Surgery
Best femoropopliteal bypass graft- 
Select and explain. 
A. PTFE, B. Autologus saphenous vein, C. Dacron, D. None
B: Autologus saphenous vein
Answer: B: Autologus saphenous vein 
Explanation: Ans. is 'b' i.e., Autologus saphenous vein