What is incorrect about the reactions of `KMnO_(4)` and oxilic acid

Options

A. `CO_(2)` is formed
B. decolourisation is fast in beginning but become slow after after some time
C. `Mn^(2+)` is autocatalyst
D. It is a redox change

Answer

B

Explanation

`2MnO_(4)^(-)+5H_(2)C_(2)O_(4)+6H^(+)to2Mn^(+)+10CO_(2)+8H_(2)O`