This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hepatobiliary System, Subject name: Anatomy
Posterior relation of portal vein - 
Select and explain. 
A. Pancreas, B. Gall bladder, C. Inf. vena cava, D. CBD
C: Inf. vena cava
Answer: C: Inf. vena cava 
Explanation: Ans. is 'c' i.e., IVC Important relations about portal vein o Infraduodenal part i) Anterior :- Neck of pancreas ii) Posterior :- IVC o Retroduodenal part i) Anterior :- 1stpart of duodenum, bile duct, gastroduodenal artery ii) Posterior :- IVC o Supraduodenal part i) Anterior :-Hepatic artery, bile duct ii) iPosterior :- IVC, separated by epiploic formen