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Among the following series of transition metal ions, the one where all metal ions have \( 3 d^{2} \) electronic configuration is (At. nos. \( \mathrm{Ti}=22 ; \mathrm{V}=23 ; \mathrm{Cr}=24 ; \mathrm{Mn}=25 \) )
(CBSE PMT 2004)
\( \mathrm{P} \)
(a) \( \mathrm{Ti}^{3+}, \mathrm{V}^{2+}, \mathrm{Cr}^{3+}, \mathrm{Mn}^{4+} \)
(b) \( \mathrm{Ti}^{+}, \mathrm{V}^{4+}, \mathrm{Cr}^{6+}, \mathrm{Mn}^{7+} \)
(c) \( \mathrm{Ti}^{4+}, \mathrm{V}^{3+}, \mathrm{Cr}^{2+}, \mathrm{Mn}^{3+} \)
(d) \( \mathrm{Ti}^{2+}, \mathrm{V}^{3+}, \mathrm{Cr}^{4+}, \mathrm{Mn}^{5+} \)
W.
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