Which one of the following classes of phylum $Mollusca$ is incorrectly matched with its general characteristics?

• A
  $Gastropoda$ - Larvae are bilaterally symmetrical; but in adults,the twisting of viscera makes them lose this symmetry. Some,like land snails and slugs (a shell-less form),live on land.
• B
  $Bivalvia$ - They are sedentary filter feeders.
• C
  $Cephalopoda$ - They are at the apex of invertebrate evolution in terms of learned behaviour they exhibit. The eyes are image-forming,somewhat similar to ours.
• D
  $Pelecypoda$ - They have sensory tentacles and their foot is reduced into a tongue-shaped structure which helps them to burrow into the sea floor.