IL_2 is secreted by -: (A) CD4 lymphocytes, (B) CD8 cells, (C) Macrophages, (D) Neutrophils
Answer is A. IL-2 produced by activated T cells, which induced T cell proliferation and enabled their maintenance in continuous culture REF:Ananthanarayan & Panikers Textbook of Microbiology 9th Edition pg:155