This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen & Pelvis, Subject name: Anatomy
[{'content': 'Normal splanchnic blood supply of the liver includes- \nSelect and explain. \nA. Portal vein, B. Splenic artery, C. Superior mesenteric artery, D. Inferior mesenteric vein', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Portal vein * Liver has dual blood supply and receives 20% of its blood supply through hepatic artery (systemic) and 80% through portal vein (splanchnic). Portal vein is formed by union of splenic vein and superior mesenteric veins.* Venous drainage is through hepatic veins into IVC.", 'role': 'assistant'}]