The reaction representing the $Mond$ process for metal refining is $............$.

  • A
    $Ni + 4 CO \xrightarrow{\Delta} Ni(CO)_4$
  • B
    $2 K[Au(CN)_2] + Zn \xrightarrow{\Delta} K_2[Zn(CN)_4] + 2 Au$
  • C
    $Zr + 2 I_2 \xrightarrow{\Delta} ZrI_4$
  • D
    $ZnO + C \xrightarrow{\Delta} Zn + CO$

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