The correct option is D Entamoeba
Amoeboid protozoa
Amoeboid protozoans are the protists with amoeboid structure, i.e, irregularly shaped, that live in freshwater, moist places and sea water. They have heterotrophic modes of nutrition. They have pseudopodia that helps in movement and capturing food.
Entamoeba
Entamoeba are amoeboid protozoans that have a parasitic mode of nutrition. They have an amoeboid structure with pseudopodia. These infect humans and reside in their colon and cecum.