<prompt> Type III reaction is-Antibody mediatedImmune complex mediatedCell mediatedNone  <response>: Option 2 Type-III hypersensitivity reactions are as a result of excess formation of immune complexes Ag-Ab complexes which initiate an inflammatory response through activation of complement system leading to tissue injury: Localized or Ahus reaction Generalized or Systemic type III Reactions, e.g. Serum sickness. Option 1 Type-I: IgE-mediated degranulation of basophils or mast cells. Type-II: IgG Antibodies against cell surface antigen, causing damage by ADCC or complement activation. Option 3 Type-IV hypersensitivity:- It is delayed type occurs after 48-72 hours of antigen exposure Cell mediated: Characteristic cells called TDTH cells are the principal mediators 