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
Pro-inflammatory cytokines are:
(A)IL-1
(B)1L-2
(C)IL- 4
(D)IL- 6,
(E)IL- 8 
Select and explain. 
A. ABC, B. CAB, C. ADE, D. BAC
C: ADE
Answer: C: ADE 
Explanation: None