The oxidation of oxalic acid by acidified `KMnO_(4)` is an example of autocatalyiss. It is due to which of the following ?

Options

A. `SO_(4)^(2-)`
B. `MnO_(4)^(2-)`
C. `Mn^(2+)`
D. `K^(+)`

Answer

C

Explanation

During the reaction oxalic acid is oxidised to `CO_(2)` but `KMnO_(4)` is reduced to `Mn^(2+)` which catalyses the reaction.