This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Liver, Subject name: Anatomy
[{'content': 'Venous drainage of liver into IVC is through: \nSelect and explain. \nA. Poal vein, B. Hepatic veins, C. Azygous vein, D. Superior mesenteric vein', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The upper group ( right, left and middle) and lower group (variable numbers) of hepatic veins open in vena cava as venous drainage of liver. Poal vein carry venous blood of gut to liver Superior mesentric vein and splenic vein will form Poal vein.', 'role': 'assistant'}]