Sodium nitroprusside, when added to an alkaline solution of sulphide ions, produces purple colour ion due to the formation of
A. `Na[Fe(H_(2)O)_(5)NOS]`
B. `Na_(2)[Fe(H_(2)O)_(5)NOS]`
C. `Na_(3)[Fe(CN)_(5)NOS]`
D. `Na_(4)[Fe(CN)_(5)NOS]`

Sodium nitroprusside when added to an alkaline solution of sulphide ions produces
A. red colouration
B. blue colouration
C. purple colouration
D. brown colouration