<prompt> Poal vein is formed by the union ofSplenic and inferior mesentric veinsSplenic and superior mesentric veinsRight and left hepatic veinsHepatic and splenic veins  <response>: 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 