$Cu^{+}$ ion is not stable in aqueous solution,because it shows $-$

Which one of the following does not undergo disproportionation reaction?

Which species among the following does not show disproportionation reactions?

Assign $A$,$B$,$C$,$D$ from given type of reaction.
$A$ for precipitate formation reaction.
$B$ for precipitate dissolution reaction.
$C$ for precipitate exchange reaction.
$D$ for no reaction.
$P_4 + 3NaOH + 3H_2O \longrightarrow PH_3 + 3NaH_2PO_2$
Identify the correct category for the given reaction.

Which ion undergoes disproportionation in an aqueous solution?

Which one of the following is an example of a disproportionation reaction?