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
Poal vein is formed by the union of 
Select and explain. 
A. Splenic and inferior mesentric veins, B. Splenic and superior mesentric veins, C. Right and left hepatic veins, D. Hepatic and splenic veins
B: Splenic and superior mesentric veins
Answer: B: Splenic and superior mesentric veins 
Explanation: The poal vein is usually formed by the confluence of the superior mesenteric and splenic veins and also receives blood from the inferior mesenteric, gastric, and cystic veins. Ref - BDC 6e vol2 pg282