1.

{:(,"Column I",,"Column II"),(("A"),[Ni(CO)_(4)],(p),"Square planar"),(("B"),[Ni(CN)_(4)]^(2-),(q),"Tetrahedral"),(("C"),[Cu(NH_(3))_(4)]^(2+),(r),"Paramagnetic"),(("D"),[FeCl_(4)]^(2-),(s),"Diamagnetic "):}

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ANSWER :A::B::C::D


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