<prompt> IgE is secreted by -Mast cellBasophilsEosinophilsPlasma cells  <response>: IgE is synthesised by plasma cells. Monomers of IgE consist of two heavy chains e chain and two light chains, with the e chain containing 4 Ig-like constant domains Reff: Ananthanarayanan Panikers textbook of microbiology 9th edition pg:136 