Among the following series of transition metal ions the one where all the metal ions have `3d^2` configuration is - (At No `T_i = 22 , `V=23`, Cr = 24`, Mn = 25`)

Options

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