`25ml` of a `0.1(M)` solution of a stable cation of transition metal `z` reacts exactly with `25 ml` of `0.04(M)` acidified `KMnO_(4)` solution. Which of the following is most likely to represent the change in oxidation state of `Z` correctly?

Options

A. `Z^(+)rarrZ^(2+)`
B. `Z^(2+)rarrZ^(3+)`
C. `Z^(3+)rarrZ^(4+)`
D. `Z^(2+)rarrZ^(4+)`

Answer

d