Which of the following reactions is possible at the anode?

  • A
    $2Cr^{3+} + 7H_2O \to Cr_2O_7^{2-} + 14H^{+} + 6e^{-}$
  • B
    $F_2 + 2e^{-} \to 2F^{-}$
  • C
    $\frac{1}{2}O_2 + 2H^{+} + 2e^{-} \to H_2O$
  • D
    None of these

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