<prompt> Role of macrophages in antibody production is?Antigen presentationB cell productionClass switchingB cell activation  <response>: Ans. a. Antigen presentationRef: Robbins 9th198Macrophages that have phagocytosed microbes and protein antigens process the antigens and present peptide fragments to T cells. Upon activation, B lymphocytes proliferate and then differentiate into plasma cells that secrete different classes of antibodies with distinct functions 