<prompt> T helper cells recognizes -MHC class IMHC class IIProcessed peptidesSurface Ig  <response>: MHC restrictionT cells in contrast to B cells cannot be activated by soluble antigens.Therefore, presentation of processed antigen by antigen presenting cells is required for induction of cell mediated immunity.T cell receptors recognizes peptide antigens that are displayed by major histo compatibility complex MHC molecules on the surface of antigen presenting cells.T cells develop MHC restriction so that :-Helper CD4 T cells respond only to foreign antigens presented along with HLA class II MHC class II.CD8 T cells respond to antigens presented along with HLA class I MHC class I.MHC restriction refers to the fact that a given T cell will recognize a peptide antigen only when it is bound to a particular MHC molecule. 