When `KMnO_(4)` acts as an oxidising agnet and ultimetely from `MnO_(4)^(2-), MnO_(2), Mn_(2)O_(3)`, and `Mn^(2+)`, then the number of electrons transferred in each case, respectively, are

Explanation

`overset("+7")KMnO_(4) + e^(-) rarr overset("+6")MnO_(4)^(2+)`
`overset("+7")KMnO_(4) + 3e^(-) rarr overset("+4")MnO_(2)`
`overset("+7")KMnO_(4) + 4e^(-) rarr 1//2overset("+3")Mn_(2)O_(3)`
`KMnO_(4) + 5e^(-) rarr overset("+2")Mn^(2+)`