<prompt> Type III reaction is:Antibody mediatedImmune complex mediatedCell mediatedNone  <response>: Ans. is b i.e., Immune complex mediatedRef: Ananthanarayan, 9the, p. t621 Type III reactions differ from type II reactions because its antigens are not attached to the surface of the cell. Immune complex mediated Ag - Ab mediated - deposited in tissue. Usually complement bound to complex - so serum level falls. Neutrophil attracted and release enzymes. 