Which of the following pair belong to phylum Mollusca?
Pila, Obelia
Pinctada, Pleurobrachia
Sepia, Chalina
Loligo, Aplysia
Pila, Pinctada, Sepia, Loligo, Aplysia belongs to phylum Mollusca.
Obelia belongs to phylum Cnidaria.
Chalina belongs to phylum Porifera.
Pleurobrachia belongs to phylum Ctenophora.