<prompt> Which of the following do not play role in production, maintainance activation of lymphocytes? -IL-1IL-2IL-4IL-12  <response>: Ananthanarayanan and Panikers textbook of microbiology 9th edition . IL1 helps in the proliferation and differentiation of T and B lymphocyte. IL2 Promote growth and differentiation of Tand B cells. IL4 promote proliferation B and cytotoxic T lymphocytes. IL12 activates NK cells. 