Among the following series of transition metal ions, the one where all metal ions have `3d^2` electronic configuration is (At. nos. Ti = 22, V = 23, Cr = 24, Mn = 25)
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+)`
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