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': 'Which one of the following factors is labelled as cytokine in the pathogenesis of systemic inflammatory response syndrome (SIRS) ? \nSelect and explain. \nA. Nitric oxide, B. Complements, C. Leukotrienes, D. Tumor Necrosis factor', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Tumor Necrosis factor", 'role': 'assistant'}]