Which of the following is not a characteristic of chordates?

  • A
    Presence of notochord
  • B
    Central nervous system is dorsal
  • C
    Absence of gills
  • D
    Presence of post anal part (tail)

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Assertion $A$: $Amphioxus$ is not a vertebrate.
Reason $R$: $Amphioxus$ is not a chordate.
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