Assign $A$,$B$,$C$,$D$ from the given type of reaction.
$CuO + H_2 \longrightarrow Cu + H_2O$

  • A
    for disproportionation reaction.
  • B
    for comproportionation reaction.
  • C
    for either intermolecular redox reaction or displacement reaction.
  • D
    for either thermal combination redox reaction or thermal decomposition redox reaction.

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