Select the incorrect statement about earthworm.

Their sense organs are concentrated at the anterior end of the body. When earthworm comes out of burrow, it is the anterior end which protrudes out. Photoreceptors are concentrated on the dorsal side of prostomium and peristomium. In bilaterally symmetrical animals, it is the anterior end which first enters a new environment and hence sense organs are concentrated at the anterior end (cephalization).