This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
All are mediators of neutrophils except 
Select and explain. 
A. Elastase, B. Cathepsin, C. Nitric oxide, D. None
D: None
Answer: D: None 
Explanation: Ref Robbins 8/e p53-54; 7/e p69;9/e p80 Cathepsin G is a serine protease secreted by activated neutrophils that play a role in the inflammatory response