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Among the following series of transition...

Among the following series of transition metal ions, the one where all metal ions have `3d^(2)` electronic configuration is:

A

`Ti^(3+),V^(2+),Cr^(3+),Mn^(4+)`

B

`Ti^(+),V^(4+),Cr^(6+),Mn^(7+)`

C

`Ti^(4+),V^(3+),Cr^(2+),Mn^(3+)`

D

`Ti^(2+),V^(3+),Cr^(4+),Mn^(5+)`

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