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