The correct answer to this question is this one: "sporozoans lack locomotor organs" The feature that differentiates sporozoans from the other phyla of protozoans is that sporozoans lack locomotor organs. Sporozoans are a strictly parasitic protozoan that are usually immobile.
Sporozoa and protozoa both are parasitic as they are unable to produce food of their own and therefore depend on other organisms in one or the other way to derive food. Thus, option B is incorrect
Both protozoa and Sporozoan are able to reproduce asexually through binary fission . Thus, option C is incorrect
Sporozoan do not have locomotary organs like cilia , flagellate etc, as compared to the ones present in protozoa and hence Option A is the correct answer
