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': 'All of the following are pyrogenic cytokines, Except- \nSelect and explain. \nA. Interleuken 18 (IL-18), B. Interleuken 6 (IL-6), C. Tumor Necrosis Factor (TNF), D. Interferon a (IFN-a)', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Interleukin 18 (IL-18) Interleukin 18 is not a pyrogenic cytokine.", 'role': 'assistant'}]