This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'Which of the following is not a pro-inflammatory cytokine? \nSelect and explain. \nA. IL-1, B. TNF alpha, C. IL-4, D. IL-8', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Proinflammatory cytokines include interleukin-1 (IL-1), tumour necrosis factor alpha (TNFa), IL-6 and IL-8Counterinflammatory response regulated by IL-4, -5, -9 and-13 and transforming growth factor beta )Ref: Bailey and love 27e pg: 3,4', 'role': 'assistant'}]