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: Pathology
Which of the following is most specific for cholestasis 
Select and explain. 
A. ALT, B. AST, C. GGT, D. 5I nucleotidase
D: 5I nucleotidase
Answer: D: 5I nucleotidase 
Explanation: It is most specific for cholestasis and cholestatic damage.