This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
Posterior relation of poal vein 
Select and explain. 
A. 1st pa of duodenum, B. Hepatic aery, C. Bile duct, D. IVC
D: IVC
Answer: D: IVC 
Explanation: The poal vein usually measures approximately 8 cm in adults. It originates behind the neck of the pancreas and is classically formed by the confluence of the superior mesenteric and splenic veins. ref - BDC 6e vol2 pg282 , researchgate.net