Assign $A, B, C, D$ from the given type of reaction.
$Fe^{2+}(aq.) + Cr_2O_7^{2-}(aq.) + H^+(aq.) \longrightarrow Fe^{3+}(aq.) + Cr^{3+}(aq.) + H_2O(l)$
$Fe^{2+}(aq.) + Cr_2O_7^{2-}(aq.) + H^+(aq.) \longrightarrow Fe^{3+}(aq.) + Cr^{3+}(aq.) + H_2O(l)$
- A$A$. for disproportionation reaction.
- B$B$. for comproportionation reaction.
- C$C$. for either intermolecular redox reaction or displacement reaction.
- D$D$. for either thermal combination redox reaction or thermal decomposition redox reaction.
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