This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': "The Couinaud's segmental nomenclature is based on the position of the : \nSelect and explain. \nA. Hepatic veins and poal vein, B. Hepatic veins and biliary ducts, C. Poal vein and biliary ducts, D. Poal vein and hepatic aery", 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Hepatic vein & poal vein', 'role': 'assistant'}]