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: Anatomy
[{'content': 'The portal vein is related to all, except - \nSelect and explain. \nA. Pancreas, B. Gall bladder, C. Inferior vena cava, D. CBD', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Important relations about portal vein\n\nInfraduodenal part\n\ni) Anterior:- Neck of the pancreas\nii)Posterior:- IVC\n\nRetroduodenal part\n\ni) Anterior:- 1st part of the duodenum, bile duct, gastroduodenal artery\nii)Posterior:- IVC\n\nSupraduodenal part\n\ni) Anterior:- Hepatic artery, bile duct\nii)Posterior:- IVC, separated by epiploic formal', 'role': 'assistant'}]