Select the incorrect option regarding the nervous system in an earthworm.

• A
  The nervous system consists of ganglia.
• B
  The ganglia are arranged segmentally on the double ventral nerve cord.
• C
  In the anterior region,the nerve cord bifurcates,encircles the pharynx,and joins the cerebral ganglia dorsally to form a nerve ring.
• D
  The cerebral ganglia,along with other nerves in the nerve ring,integrate sensory inputs and command muscular responses.