Select the incorrect statements with respect to Cyclostomes:
$(a)$ They lack scales and paired fins.
$(b)$ They have a circular mouth with jaws.
$(c)$ They bear $6-15$ pairs of gills.
$(d)$ They migrate to deep sea for spawning.
Choose the most appropriate answer from the options given below:

  • A
    $(a)$ and $(b)$ only
  • B
    $(b)$ and $(c)$ only
  • C
    $(b)$ and $(d)$ only
  • D
    $(a)$ and $(d)$ only

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