The correct order of decreasing H-C-H angle in the following molecules is 
I > II > III
II > I > III
III > II > I
I > III > II
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NiCl2{P(C2H5)2(C6H5)}2 exhibits temperature dependent magnetic behaviour (paramagnetic/diamagnetic). The coordination geometries of Ni2+ in the paramagnetic and diamagnetic states are respectively