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: Surgery
[{'content': 'Surgical lobes of liver are divided on the basis of -a) Hepatic artery b) Hepatic vein c) Bile ducts d) Portal vein e) Central veins \nSelect and explain. \nA. c, B. bd, C. ab, D. ac', 'role': 'user'}, {'content': 'Answer: B \nExplanation: French anatomist Couinaud divided liver into 8 segments based on portal vein blood supply and hepatic venous outflow.', 'role': 'assistant'}]