$3Br_2 + 6CO_3^{2-} + 3H_2O \to 5Br^- + BrO_3^- + 6HCO_3^-$
In the above reaction,

  • A
    Bromine is oxidized and carbonate is reduced.
  • B
    Bromine is both oxidized and reduced.
  • C
    Bromine is reduced and water is oxidized.
  • D
    Bromine is neither oxidized nor reduced.

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