Which of the following animals are metamerically segmented schizocoelomates?
Nereis and Pheretima belong to phylum Annelida (Segmented Schizocoelomates)
Octopus and Aplysia belong to phylum Mollusca (Unsegmented Schizocoelomates).
Antedon, Cucumaria, Asterias and Ophiura belong to phylum Echinodermata (Unsegmented Enterocoelomates).