The correct option is D All of the above
Sporozoans are a type of microorganism which is characterized by no cilia or flagella. These are generally parasitic and are carried by a vector. The best-known sporozoan is Plasmodium falciparum, the causative organism of malaria. Monocystis belongs to Sporozoa is a parasite in seminal vesicles of earthworm and lack locomotory organs in the adult stage. Eimeria (sporozoan) is a protozoan parasite and causes the infections in many animals like cattle, goat etc. Thus, the correct answer is option D.