Given below are two statements:
Statement I: Among $$[Cu(NH_{3})_{4}]^{2+},[Ni(en)_{3})]^{2+},[Ni(NH_{3})_{6}]^{2+}$$ and $$[Mn(H_{2}O)_{6}]^{2+},[Mn(H_{2}O)_{6}]^{2+}$$ has the maximum number of unpaired electrons.
Statement II : The number of pairs among $$\left\{[Ni(Cl_{4}]^{2-},[Ni(CO)_{4}]\right\}$$, $$\left\{[NiCl_{4}]^{2-},[Ni(CN)_{4}]^{2-}\right\}$$ and $$\left\{[Ni(CO)_{4}],[Ni(CN)_{4}]^{2-}\right\}$$ that contain only diamagnetic species is two.
ln the light of the above statements, choose the correct answer from the options given below: