IL-1 is produced by -: (A) Macrophage, (B) Helper T lymphocytes, (C) B cells, (D) Cytotoxic T-cells
Answer is A. It is principally secreted by macrophages and monocytes but can be produced by most other nucleated cells as well REF:Ananthanarayan & Panikers Textbook of Microbiology 9th Edition pg:154