Given below are two statements:
Statement I: Among [Cu(NH₃)²⁺, [Ni(en)₃)]²⁺, [Ni(NH₃)₆]²⁺ and [Mn(H₂O)₆]²⁺, [Mn(H₂O)₆]²⁺, has the maximum number of unpaired electrons.
Statement II: The number of pairs among {[NiCl₄]^2–, [Ni(CO)₄]}, {[NiCl₄]^2–, [Ni(CN)₄]^2– and {[Ni(CO)₄], [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: