The number of paramagnetic species from the following is ____. [ Ni ( CN )_4]^2-,[ Ni ( CO )_4],[ NiCl_4]^2-, [ Fe ( CN )_6]^4-,[ Cu ( NH_3)_4]^2+ […

The number of paramagnetic species from the following is $\displaystyle \_\_\_\_$. $$\begin{aligned} & {\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-},\left[\mathrm{Ni}(\mathrm{CO})_4\right],\left[\mathrm{NiCl}_4\right]^{2-},} \\ & {\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-},\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}} \\ & {\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-} \text { and }\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}} \end{aligned} $$