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
CSF leakage is diagnosed by all except 
Select and explain. 
A. Tram Line, B. β 2- transferrin level, C. increase in glucose, D. increase in proteins
C: increase in glucose
Answer: C: increase in glucose 
Explanation: None