Match the following

	Column-I Complex		Column-II Structure / Geometry / Property
(A)	${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$	(I)	Tetrahedral / Paramagnetic
(B)	$\left[\mathrm{Ni}{\left(\mathrm{CO}\right)}_4\right]$	(II)	Tetrahedral / Diamagnetic
(C)	${\left[{\mathrm{NiCl}}_4\right]}^{2-}$	(III)	Square planar / Diamagnetic

The correct match is

The coordination complex ${\left[\mathrm{Cu}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$ has one unpaired electron, which of the following statements are true?

(i) The complex is octahedral.

(ii) The complex is an outer orbital complex.

(iii) The complex is diamagnetic.

The correct match is

Which of the following molecules/ions can exhibit isomerism:

Here, $\mathrm{en}=1, 2$-di amino ethane.