This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemical Mediators and Regulators of Inflammation, Subject name: Pathology
[{'content': 'IL2 is secreted by? \nSelect and explain. \nA. Neutrophills, B. Helper T-cells, C. Macrophages, D. NK cells', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Helper T-cells o IL-2 is secreted by lectin- or antigen-stimulated helper T cellsSelected important cytokinesNameMajor Cellular SourceSelected Biologic EffectsIFN-a, -bLeukocytes (IFN-a), fibroblasts (IFN-b)Antiviral, pyrogenicIFN-( interferon)T cells, NK cellsActivates mononuclear phagocytesTNF-a (tumor necrosis factor alpha)Macrophages, NK cellsCell activation, fever, cachexia, antitumorTNF -b (tumor necrosis factor beta), LT (lymphotoxin)T cells, B cellsActivates leukocytes, antitumorIL-1 (interleukin - 1)Macrophages, epithelial cellsT cell and macrophage activation,fever, cachexiaIL-2 (interleukin - 2)T cells (CD4 Helper T-cells)T cell growth and activationIL-3 (interleukin - 3)T cells, thymic epithelial cellsHematopoiesisIL-4 (interleukin - 4)T cells, mast cells, NK cellsB cell proliferation and switching to IgEIL-5 (interleukin - 5)T cellsDifferentiation of eosinophils(NEET)IL-7 (interleukin - 7)Bone marrow stromal cellsLymphoid progenitor differentiation", 'role': 'assistant'}]