Which one of the following ions has electronic configuration [Ar]3d^6 (Atomic number of Mn = 25, Fe = 26,C_@ = 27, N i = 28)

Which one of the following ions has electronic configuration [Ar]3d^6

1.	Which one of the following ions has electronic configuration [Ar]3d^6 (Atomic number of Mn = 25, Fe = 26,C_@ = 27, N i = 28)
Answer» `CO^(+3)` `N i^(+2)` `Mn^(+3)` `Fe^(+3)` Answer :A