Amongst $\mathrm{I}={\left[\mathrm{Co}{\left(ox\right)}_3\right]}^{3-},\mathrm{II}={\left[{\mathrm{CoF}}_6\right]}^{3-},\mathrm{III}={\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]}^{+3}$

I, III are paramagnetic, II is diamagnetic

I, III are diamagnetic, II is paramagnetic

II, III are paramagnetic and I is diamagnetic

I, II are paramagnetic, and III is diamagnetic