Coordination Compounds: JEE Main 2026 Chemistry question

Given below are two statements : Statement I : Among $\mathrm{[Cu(NH_3)_4]^{2+}}$, $\mathrm{[Ni(en)_3]^{2+}}$, $\mathrm{[Ni(NH_3)_6]^{2+}}$ and $\mathrm{[Mn(H_2O)_6]^{2+}}$, $\mathrm{[Mn(H_2O)_6]^{2+}}$ has the maximum number of unpaired electrons. Statement II : The number of pairs among $\{\mathrm{[NiCl_4]^{2-}}$, $\mathrm{[Ni(CO)_4]}\}$, $\{\mathrm{[NiCl_4]^{2-}}$, $\mathrm{[Ni(CN)_4]^{2-}}\}$ and $\{\mathrm{[Ni(CO)_4]}$, $\mathrm{[Ni(CN)_4]^{2-}}\}$ that contain only diamagnetic species is two. In the light of the above statements, choose the correct answer from the options given below :