One of the following is not an Annelid
(a) Nereis
(b) Earthworm
(c) Leech
(d) Urchins
Answer-(d)
Nereis, earthworms and leeches belong to the phylum Annelida. It is a group of animals having segmented body without spines and their body surface is covered with cuticles
Urchin belongs to the phylum Echinodermata. It is a marine animal with a globe-like shape and radial symmetry. Its body is covered with long spines for protection.
The correct answer is d) Urchins.