Select correct statement(s):
(I) When excess `FeCl_(3)` solution is added to `K_(4)[Fe(CN)_(6)]` solution, in addition to `Fe^(III)[Fe^(II)(CN)_(6)]^(-),Fe^(II)[Fe^(III)(CN)_(6)]^(-)` is also formed due to side redox reaction
(II) When `FeCl_(2)` is added to `K_(3)[Fe(CN)_(6)]` solution, in addition to `Fe^(II)[Fe^(III)(CN)_(6)]^(-),Fe^(III)[Fe^(II)(CN)_(6)]^(-)` is also formed due to side redox reaction.
(III) `Fe^(III)[Fe^(II)(CN)_(6)]^(-)` is paramagnetic while `Fe^(II)[Fe^(III)(CN)_(6)]^(-)` is diamagnetic.
(IV) `Fe^(III)[Fe^(II)(CN)_(6)]^(-)` is diamagnetic while `Fe^(II)[Fe^(III)(CN)_(6)]^(-)` is paramagnetic

Options

A. I,II
B. III,IV
C. both (a) and (b)
D. none of these

Answer

A