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
Coronary graft is most commonly taken from? 
Select and explain. 
A. Femoral vein, B. Saphenous vein, C. Axillary vein, D. Cubical vein
B: Saphenous vein
Answer: B: Saphenous vein 
Explanation: Ans. (b) Saphenous veinRefi: Introductory Guide to Cardiac Catheterization- Arman T. Askari, Medhi H. Shishehbor, Ronnier J. Aviles 159