<prompt> Non-pathogenic amoebae isare -E. histolyticaE.coliAcanthanmoebaAll  <response>: Ans. is b i.e., E. coli Non-pathogenic amaebae are E.hamanni, E.coli, E.polecki, Endolimax nana, lodamoeba botschlii, and Dientamoeba fragilis. 