Which among the following is true for the Balz-Schiemann reaction?

  • A
    In this,$Ar-Cl$ is obtained from $Ar-N_{2}^{+} X^{-}$
  • B
    It is useful for the preparation of nitrobenzene from benzene diazonium salts
  • C
    In this,$Ar-CN$ is obtained from $Ar-N_{2}^{+} X^{-}$
  • D
    In this,$Ar-F$ is obtained from $Ar-N_{2}^{+} X^{-}$

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