This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Commonest site of thromboangitis obliterans is 
Select and explain. 
A. Femoral aery, B. Popiteal aery, C. iliac aery, D. None
D: None
Answer: D: None 
Explanation: Ans. is 'None' Distal circulation is involved in Buerger's disease, usually distal to popliteal and brachial aery.