Which one of the following complexes is violet in colour?

In which of the following order the given complex ions are arranged correctly with respect to their decreasing spin only magnetic moment?
(i) ${\left[{\mathrm{FeF}}_6\right]}^{3-}$

(ii) ${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$

(iii) ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$

(iv) ${\left[\mathrm{Cu}{\left({\mathrm{NH}}_3\right)}_4\right]}^{2+}$

Given below are two statements:
Statement I : The identification of ${\mathrm{Ni}}^{2+}$ is carried out by dimethyl glyoxime in the presence of ${\mathrm{NH}}_4\mathrm{OH}$.

Statement II :The dimethyl glyoxime is a bidentate neutral ligand.

In the light of the above statements, choose the correct answer from the options given below: