$Na_2CO_3 + Fe_2O_3 \xrightarrow{\Delta} A + CO_2$. What is $A$ in the reaction?

  • A
    $NaFeO_2$
  • B
    $Na_3FeO_3$
  • C
    $Fe_3O_4$
  • D
    $Na_2FeO_2$

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