Right option is (d) Plasmodium
The best I can explain: Plasmodium species is a malaria parasite and is not a species of earthworms, whereas, Epifilis, Endogens, Aneciques are the most common species of earthworms used as Vermicomposting earthworms, some with dark pigments and some with uniform coloration having high growth rate, the digestion rate and absorption rate of the consumed food by earthworms is high and they can very well adapt to the changing environmental conditions.