The chemical reaction that involves the roasting process is:

  • A
    $Fe_2O_3 + 3CO \longrightarrow 2Fe + 3CO_2$
  • B
    $2Al + Fe_2O_3 \longrightarrow 2Fe + Al_2O_3$
  • C
    $2ZnS + 3O_2 \longrightarrow 2ZnO + 2SO_2$
  • D
    $FeO + SiO_2 \longrightarrow FeSiO_3$

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