Which of the following is an incorrectly matched complex?

  • A
    $K_3[Co(C_2O_4)_3]$ || $+3$ || $t_{2g}^6 e_g^0$
  • B
    $(NH_4)_2[CoF_4]$ || $+2$ || $t_{2g}^5 e_g^2$
  • C
    $Cis-[Cr(en)_2Cl_2]Cl$ || $+3$ || $t_{2g}^3 e_g^0$
  • D
    $[Mn(H_2O)_6]SO_4$ || $+2$ || $t_{2g}^3 e_g^2$

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Given below are two statements:
Statement $I$: Presence of a large number of unpaired electrons in transition metal atoms results in higher enthalpies of their atomisation.
Statement $II$: $d_{xy} = d_{xz} = d_{yz} < d_{x^2-y^2} = d_{z^2}$ and $d_{x^2-y^2} < d_{xy} = d_{xz} = d_{yz}$ are the $d$-orbital splittings in $[Fe(H_2O)_6]^{3+}$ and $[Ni(Cl)_4]^{2-}$ complex ions respectively.
In the light of the above statements,choose the correct answer from the options given below:

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