A) ciliate protozoans
B) sporozoan protozoans
C) sarcodine protozoans
D) choanoflagellate protozoans
Correct Answer: D
Solution :
Animal kingdom is broadly separated into Protozoa and Metazoa (it includes sponges). According to Lankester the Metazoa originated From choanoflagellate protozoan (e.g., Proterospongia).
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