<prompt> Which is an example of type-III hypersensitivityContact dermatitisHemolytic anemiaSerum sicknessGood pasture syndrome  <response>: Serum sickness is type III hypersensitivity reaction. Type III hypersensitivity reaction is immune complex diseases. Damage is caused by antigen- antibody complexes. These may precipitate in and around small blood vessels causing damage to cells secondarily or on membranes, interfering with their function. Reference : Anathanarayan panikers 9th edition, pg no:162 p 