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 is not a pro-inflamatory cytokine ? 
Select and explain. 
A. IL-8, B. IL-11, C. IL-1, D. PAF
D: PAF
Answer: D: PAF 
Explanation: Ans. is 'd' i.e., PAF