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 \( \{[NiCl_{4}]^{2-}, [Ni(CO)_{4}]\}, \{[NiCl_{4}]^{2-}, [Ni(CN)_{4}]^{2-}\} \) 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:

1. A Statement I is false but Statement II is true
2. B Both Statement I and Statement II are true
3. C Both Statement I and Statement II are false
4. D Statement I is true but Statement II is false