An example of autocatalysis is...

An example of autocatalysis is

oxidiation of NO to `NO_(2)`

oxidation of `SO_(2)` to `SO_(3)`

odecomposition of `KClO_(3)` to KCl `and O_(2)`

oxidation of oxalic acid by acidified `KMnO_(4)`

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The correct Answer is:

In (d) `Mn^(2+)` ions produced in the reaction act as autocatalyst.

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