<prompt> Immune complex mediated reactionType IType IIType IIIType IV  <response>: Ans. is c i.e., Type III reactions Type III hypersensitivity o Type III hypersensitivity reaction is antigen-antibody immune complex mediated that are deposited in postcapillary venules of various tissues with subsequent complement fixation. o Immune complexes produce tissue damage mainly be eliciting inflammation. Type III hypersensitivity may be of two types A. Systemic or generalized Immune complex disease serum sickness - It occurs in three phases :? Phase I -- Formation of antigen - antibody immune - complex in the blood. Phase II -- Traveling of immune complex through blood and deposition in various tissues. Phase III --- Induction of inflammation by immune complex. Generally, common sites of deposition of immune complex incude - Skin Joints Lungs Kidney Blood vessels B. Localized immune complex disease Ahus reaction Ahus reaction is a localized area of tisue necrosis resulting from acute immune - complex vasculitis, usually elicited in the skin. 