<prompt> MHC restriction is a pa of all except-Antiviral cytotoxic T cellAntibacterial helper T cellcytotoxic cellsAllograft rejectionAutoirnmune disorder  <response>: Reference :Robbins basic pathology 9th edition pg 149:Directrecognition.HostTcellsdirectlyrecognizetheallo- geneic foreign MHC molecules that are expressed on graft cells. Direct recognition of foreign MHC seems to violate the rule of MHC restriction, which states that in every individual, all of the T cells are educated to recog- nize foreign antigens displayed by only that individuals MHC molecules. 