`MnO_4^(2-) (1mol)` in neutral aqueous medium disproportionate to

Options

A. `2//3` mole of `MnO_(4)^(-)` and `1//3` mole of `MnO_(2)`
B. `1//3` mole of `MnO_(4)^(-)` and `2//3` moles of `MnO_(2)`
C. `1//3` mole of `Mn_(2)O_(7)` and `1//3` mole of `MnO_(2)`
D. `2//3` mole of `Mn_(2)O_(7)` and `1//3` moles of `MnO_(2)`

Answer

A