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: Medicine
Which is most specific for Alcholic liver disease 
Select and explain. 
A. AST, B. ALT, C. GGT, D. ALP
C: GGT
Answer: C: GGT 
Explanation: AST: ALT ratio of  3:1 is highly specific
Next is GGT