<prompt> Epstein Barr virus causes autoimmunity by -Molecular MimicryRelease of Sequestrated AntigenInappropriate Expression of MHC Class II MoleculesPolyclonal B cell Activation  <response>: Polyclonal B cell activation: in this hypothesis, while an antigen generally activates only its corresponding B cell, ceain stimuli non specifically turn on multiple B cell clones. A Such stimuli include virus EB virus, enzymes trypsin, bacteria mycoplasma etc It is type 4 human herpes virus Reference : Anathanarayan panikers 9th edition, pg no: 179 p 