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: Microbiology
[{'content': 'Cytokine produced by TH1 cells \nSelect and explain. \nA. IL-2, B. IL-4, C. IL-5, D. IL-6', 'role': 'user'}, {'content': 'Answer: A \nExplanation: IL-2 produced by TH1 cells induces proliferation of activated T4 cells, Tc\xa0cells and some Nk cells.', 'role': 'assistant'}]