The correct option is D ganglia
The neural system of phylum Annelida consists of paired ganglia connected by lateral nerves to a double ventral nerve cord.
The body surface of annelids is distinctly marked out into segments which are called metameres.
Parapodia are lateral appendages that are present in aquatic annelids like Nereis.
Nephridia are excretory organs of annelids which help in osmoregulation and excretion.