<prompt> Posterior relation of portal vein -PancreasGall bladderInf. vena cavaCBD  <response>: 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 