$3ClO^- \to ClO_3^- + 2Cl^-$; This reaction is an example of which of the following?

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

Identify the type of reaction for the following: ${P_4} + NaOH + {H_2}O \to Na{H_2}P{O_2} + P{H_3}$

Assign $A, B, C, D$ from the given type of reaction.
$Hg_2(NO_3)_2 + 2NH_3(aq) + H_2O \longrightarrow Hg \downarrow + Hg(NH_2)NO_3 \downarrow + NH_4NO_3$
(Note: The reaction represents the disproportionation of mercury$(I)$ nitrate with ammonia.)

Which of the following is a disproportionation reaction?

Given below are two statements :
Statement $I$: $S_8$ solid undergoes disproportionation reaction under alkaline conditions to form $S^{2-}$ and $S_2O_3^{2-}$.
Statement $II$: $ClO_4^{-}$ can undergo disproportionation reaction under acidic condition.
In the light of the above statements,choose the most appropriate answer from the options given below :