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
Best vein for total parenteral nutrition is - 
Select and explain. 
A. Subclavian vein, B. Femoral vein, C. Brachial, D. Saphenous
A: Subclavian vein
Answer: A: Subclavian vein 
Explanation: The preferred site for central vein infusion is the superior vena cava & preferred access sites are subclavian > jugular > femoral vein.