White phosphorus reacts with caustic soda. The products are $PH_3$ and $NaH_2PO_2$. This reaction is an example of

Which of the following are disproportionation reactions?
$(A)$ $Cl_2 + 2 NaOH \rightarrow NaCl + NaOCl + H_2O$
$(B)$ $2 H_2O_2 \rightarrow 2 H_2O + O_2$
$(C)$ $2 KMnO_4 \rightarrow K_2MnO_4 + MnO_2 + O_2$
$(D)$ $3 MnO_4^{2-} + 4 H^+ \rightarrow 2 MnO_4^- + MnO_2 + 2 H_2O$

The reaction of $ClO_2$ with $NaOH$ gives a mixture of ..........

In acidic solution, $MnO_4^{2-}$ converts into . . . . . . .

$3Br_2 + 6CO_3^{2-} + 3H_2O \to 5Br^- + BrO_3^- + 6HCO_3^-$
In the above reaction,

What is a disproportionation reaction? Give an example.