Which of the following are inner orbital complex (i.e., involving $d^{2} {sp}^{3}$ hybridisation) and is paramagnetic in nature?

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${[Mn (CN)_{6}]}^{3 -}, {[Fe (CN)_{6}]}^{3 -}, {[Co {(C_{2} O_{4})}_{3}]}^{3 -}$

${[{MnCl}_{6}]}^{3 -}, {[{FeF}_{6}]}^{3 -}, {[{CoF}_{6}]}^{3 -}$

${[Mn (CN)_{6}]}^{3 -}, {[Fe (CN)_{6}]}^{3 -}$

${[{MnCl}_{6}]}^{3 -}, {[Fe (CN)_{6}]}^{3 -}, {[Co {(C_{2} O_{4})}_{3}]}^{3 -}$

answer is C.

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Detailed Solution

${[Mn (CN)_{6}]}^{3 -} and {[Fe (CN)_{6}]}^{3 -}$ are inner orbital complexes and paramagnetic while ${[Co {(C_{2} O_{4})}_{3}]}^{3 -}$ is diamagnetic in nature

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