alleryWhich pair contains only sponges?
AHydra and Obelia
BSycon and Spongilla
CPleurobrachia and Ctenoplana
DPila and Pinctada
Answer & Solution
Correct answer: B. Sycon and Spongilla
Sycon and Spongilla belong to Porifera. Hydra and Obelia are cnidarians, Pleurobrachia and Ctenoplana are ctenophores, and Pila and Pinctada are molluscs.
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