Explanation:
B
The phylum Annelida contains trochophore larva. They are segmented, triploblastic, and bilaterally symmetric metazoa. It is also occurs in the phylum Molluscs. A trochophore larva is a tiny, pear-shaped, cilated, and unsegmented organism. These creatures are planktotrophs. They can be discovered in marine habitats, with the support of cilia, they move in a wheellike motion.
