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
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 
Select and explain. 
A. c, B. bd, C. ab, D. ac
B: bd
Answer: B: bd 
Explanation: French anatomist Couinaud divided liver into 8 segments based on portal vein blood supply and hepatic venous outflow.