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
With Couinad's nomenclature which one of the following segments of liver has an independent vascularisation - 
Select and explain. 
A. Segment I, B. Segment II, C. Segment IV, D. Segment VIII
A: Segment I
Answer: A: Segment I 
Explanation: None