This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
[{'content': 'Surgical lobes of liver are divided on the basis of \nSelect and explain. \nA. Hepatic aery, B. Hepatic vein, C. Bile ducts, D. Central veins', 'role': 'user'}, {'content': "Answer: B \nExplanation: Functional anatomy of the liver is based on couinaud's division of liver into eoght(subsequently nine) functional segments, based upon the distribution of poal venous branches and location of hepatic veins in the parenchyma Couinaud 1957", 'role': 'assistant'}]