Which one of the following statements is false -
The presence of ingested erythrocytes is seen only in Entamoeba histolytica Young adult male of low socioeconomic status are most commonly affected by invasive amoebiasis A low iron content in the diet predisposes to invasive amoebiasis The pathogenic and non-pathogenic strains of E. Histolytica can be differentiated by the electrophroretic study of zymodemes