Identify the element for which electronic configuration in +3 oxidation state is \( [\mathrm{Ar}...

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Identify the element for which electronic configuration in +3 oxidation state is \( [\mathrm{Ar}] 3 \mathrm{~d}^{5} \).
(a) \( \mathrm{Ru} \)
(b) \( \mathrm{Co} \)
(c) \( \mathrm{Mn} \)
(d) \( \mathrm{Fe} \)
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