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: Unknown
[{'content': 'Type I helper cells secrete: \nSelect and explain. \nA. Interleukin-l, B. Interleukin-2, C. Interleukin-4, D. Interleukin-5', 'role': 'user'}, {'content': 'Answer: B \nExplanation: IL -2 \n• Interleukins are “cytokines”.\n• Proteins of usually low molecular weight.\n• Regulating important biological processes.\n• Interleukins are produced by Monocytes, Macrophages, B and T Lymphocytes, mast cells, neutrophils. \nIL1 causes fever\nIL2 T cell stimulation\nIL3 Bone Marrow stimulation\nIL4 IgE Stimulation\nIL5 IgA Stimulation', 'role': 'assistant'}]