Which of the following complex is paramagnetic Memory Based Question 28/Jan/25 Evening shift

\({\left[{\mathrm{NiCl}}_{4}\right]}^{2-}\)

\(\left[\mathrm{Ni}{\left(\mathrm{CO}\right)}_{4}\right]\)

\({\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_{4}\right]}^{2-}\)

\(\left[\mathrm{Fe}{\left(\mathrm{CO}\right)}_{5}\right]\)