A) Starfish and sea anemone
B) Ctenoplana and Beroe
C) Aurlia and Paramecium
D) Hydra and starfish
Correct Answer: B
Solution :
Ctenoplana and Beroelack cnidoblasts and have biradial symmetry. These belong to phylum - Ctenophora. Hydra sea anemone, Aurelia are coelentrates, which have cnidoblasts. Although sea anemone has biradial symmetry.
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