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
Best material for below inguinal aerial graft is 
Select and explain. 
A. Saphenous vein graft (upside -down), B. PTFE, C. Dacron, D. Teflon
A: Saphenous vein graft (upside -down)
Answer: A: Saphenous vein graft (upside -down) 
Explanation: Best graft for below inguinal aerial graft is autologous long saphenous vein, if it's not available sho saphenous can be used. If no vein is available PTFE(poly tetra fluoro ethylene) can be used. Reference Bailey and love, 27th edition, page no. 949