Observe the following complexes: [Mn(CN)_6]^{ | vedclass

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(A) Let us analyze each complex:$1$. $[Mn(CN)_6]^{3-}$: $Mn^{3+}$ is $3d^4$. $CN^-$ is a strong-field ligand,causing pairing. The configuration become

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$2$

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(A) Let us analyze each complex:$1$. $[Mn(CN)_6]^{3-}$: $Mn^{3+}$ is $3d^4$. $CN^-$ is a strong-field ligand,causing pairing. The configuration becomes $t_{2g}^4 e_g^0$. It is an inner-orbital complex $(d^2sp^3)$ and is paramagnetic ($2$ unpaired electrons).$2$. $[Fe(CN)_6]^{3-}$: $Fe^{3+}$ is $3d^5$. $CN^-$ is a strong-field ligand. The configuration becomes $t_{2g}^5 e_g^0$. It is an inner-orbital complex $(d^2sp^3)$ and is paramagnetic ($1$ unpaired electron).$3$. $[Co(C_2O_4)_3]^{3-}$: $Co^{3+}$ is $3d^6$. $C_2O_4^{2-}$ is a weak-field ligand. It forms an outer-orbital complex $(sp^3d^2)$ and is diamagnetic.$4$. $[MnCl_6]^{3-}$: $Mn^{3+}$ is $3d^4$. $Cl^-$ is a weak-field ligand. It forms an outer-orbital complex $(sp^3d^2)$ and is paramagnetic.$5$. $[Fe(CN)_6]^{4-}$: $Fe^{2+}$ is $3d^6$. $CN^-$ is a strong-field ligand. The configuration becomes $t_{2g}^6 e_g^0$. It is an inner-orbital complex $(d^2sp^3)$ and is diamagnetic.$6$. $[CoF_6]^{3-}$: $Co^{3+}$ is $3d^6$. $F^-$ is a weak-field ligand. It forms an outer-orbital complex $(sp^3d^2)$ and is paramagnetic.Inner-orbital complexes are those using $(n-1)d$ orbitals. These are $[Mn(CN)_6]^{3-}, [Fe(CN)_6]^{3-}, [Fe(CN)_6]^{4-}$.Among these,the paramagnetic ones are $[Mn(CN)_6]^{3-}$ and $[Fe(CN)_6]^{3-}$.Thus,the total number is $2$.

Observe the following complexes: $[Mn(CN)_6]^{3-}, [Fe(CN)_6]^{3-}, [Co(C_2O_4)_3]^{3-}, [MnCl_6]^{3-}, [Fe(CN)_6]^{4-}, [CoF_6]^{3-}$. From the above,the number of inner orbital complexes with paramagnetic nature is

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