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
Liver segment which is physiologically independent? 
Select and explain. 
A. Segment I, B. Segment II, C. Segment III, D. Segment IV
A: Segment I
Answer: A: Segment I 
Explanation: Caudate lobe (segment I) is a physiological independent pa of liver, supplied by both right and left hepatic aeries; right and left branches of poal vein and drains bile into both right and left hepatic duct.