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
[{'content': 'Cytokine causing fever \nSelect and explain. \nA. IL-6, B. IFN-y, C. IL-18, D. IL-4', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., IL-6", 'role': 'assistant'}]