<prompt> HLA 2 is associated with?Auto immune diseasesGraft rejectionCell mediated cytolysis of viral infected cellsMixed leukocyte reaction  <response>: Ans is d i.e. Mixed leukocyte reaction o MHC class I is responsible for graft rejection and cell mediated cytolysis of viral infected or tumor cells.o MHC-II is responsible for graft versus host response and mixed leukocyte reaction.o MHC-III is involved in susceptibility to autoimmune diseases. 