The aqueous solution of $CuCrO_4$ is green because it contains

  • A

    green $Cu^{2+}$ ions

  • B

    green $CrO_4^{2-}$ ions

  • C

    blue $Cu^{2+}$ ions and green $CrO_4^{2-}$ ions

  • D

    blue $Cu^{2+}$ ions and yellow $CrO_4^{2-}$ ions

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