Total number of molecules/species from following which will be paramagnetic is ____________.
\([ \mathrm{O_2}, \ \mathrm{O_2^{+}}, \ \mathrm{O_2^{-}}, \ \mathrm{NO}, \ \mathrm{NO_2}, \ \mathrm{CO}, \ \mathrm{K_2[NiCl_4]}, \ [\mathrm{Co(NH_3)_6}]\mathrm{Cl_3}, \ \mathrm{K_2[Ni(CN)_4]} \)
