Amongst Ni(CO)4 , [Ni(CN)4]2- and NiCl42-
a. Ni(CO)4 and NiCl42- are diamagnetic and [Ni(CN)4]2- is paramagnetic
b. [NiCl4]2- and [NiCN)4]2- are diamagnetic and Ni(CO)4 is paramagnetic
c. Ni(CO)4 and [Ni(CN)4]2- are diamagnetic and [NiCl4]2- is paramagnetic
d. Ni(CO)4 is diamagnetic and [NiCl4]2- and [Ni(CN)4]2- are paramagnetic
