Mark the wrong statement from the following statements

• A

  Notochord is a mesodermally derived rod-like structure formed on the dorsal side during embryonic development.

• B

  Hemichordates have a rudimentary structure in the collar region called stomochord, a structure similar to notochord.

• C

  In Cephalochordata, notochord is present only in larval tail and is absent in the adult.

• D

  Notochord is persistent throughout the life in cartilaginous fishes and the cyclostomes.