<prompt> Antigen-antibody complex mediated hypersensitivity is -Type -1 hypersensitivityType -2 hypersensitivityType -4 hypersensitivityType -3 hypersensitivity  <response>: a Type I reactions immediate hypersensitivity Involve immunoglobulin EIgE mediated release of Histamine and other mediators from mast cells and basophils.b Type II reactions Antibody-mediated Involve immunoglobulin G or Immunoglobulin M bound to cell surface antigen, with subsequent complement fixation.c Type III reactions Immune complex-mediated involve circulating antigen-antibody complexes that deposit in postcapillary venules, with subsequent complement fixation.d Type IV reactions delayed hypersensitivity cell-mediated Mediated by T-cells. 