Mark the correct statement about the nervous system of Pheretima.

In annelids, neural system consists of paired ganglia (sing. ganglion) connected by lateral nerves to a double ventral nerve cord. A single hollow and dorsal nerve cord is characteristic of chordates. A diffused network of neurons occurs in cnidarians like Hydra. The nervous of echinoderms consists of a circumoral nerve ring and radial nerves.