<prompt> The hypersensitivity reaction involved in the hyper acute rejection of renal transplant isType IType IIType IIIType IV  <response>: Ans. is c i.e., Type III Pre-existing antibody against donor graft antigens can cause hyperacute graft rejection. . This form of rejection occurs within minutes or hours after transplantation The graft becomes engorged and purple coloured . These early lesions point to an antigen-antibody reaction at the level of vascular endothelium. The antigen-antibody reaction produces an Ahus-type type-III immune complex injury in the vessels of the transplant. 