Among the following series of transition metal ions, the one where all metal ions have same 3d electronic configuration is:

Options

A. `Ti^(2+), V^(3+), Cr^(4+), Mn^(5+)`
B. `Ti^(3+), V^(2+), Cr^(3+), Mn^(4+)`
C. `Ti^(+), V^(4+), Cr^(6+), Mn^(7+)`
D. `Ti^(4+), V^(3+), Cr^(2+), Mn^(3+)`

Answer

A