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
Cytokine causing fever 
Select and explain. 
A. IL-6, B. IFN-y, C. IL-18, D. IL-4
A: IL-6
Answer: A: IL-6 
Explanation: Ans. is 'a' i.e., IL-6