<prompt> HLA 2 is linked with?Graft rejectionKilling of viral infected cellsGraft versus host diseaseSusceptibility to autoimmune diseases  <response>: MHC class I is responsible for graft rejection and cell mediated cytolysis of viral infected or tumor cells.MHC-II is responsible for graft versus host response and mixed leukocyte reactionMHC-III is involved in susceptibility to autoimmune diseases like SLE. 