This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax And Mediastinum, Subject name: Surgery
Which of the following is most preferred graft in CABG? 
Select and explain. 
A. Saphenous vein, B. Radial aery, C. Internal mammary aery, D. Internal jugular vein
C: Internal mammary aery
Answer: C: Internal mammary aery 
Explanation: Vascular graft Bioprosthetic Synthetic Autograft Homograft (allograft) Heterograft (xenograft) Tissue engineered Textile Dacron Non textile ePTFE Polyurethane Best natural vascular graft: Reversed saphenous vein Best synthetic vascular graft: Dacron Best vascular graft for supra inguinal bypass: Dacron Best vascular graft for infra inguinal bypass: Saphenous vein Best vascular graft for aoa: Dacron Most preferred graft for CABG: LIMA (left internal mammary aery) > Saphenous vein MC used graft for CABG: Saphenous vein