<prompt> Lofflers medium is -Indicator mediumSelective mediumEnrichment mediumEnriched medium  <response>: When a basal medium is added with some nutrients such as blood, serum, egg, it is called enriched medium Loeffler serum slope - serum is added for enriching the medium is used for grouping Corynebacterium diphtheriae REF:a textbook of Microbiology Dr.C.P.Baveja 4th Edition pg no: 43 