The$\mathrm{CFSE}$for octahedral$[{\mathrm{CoCl}}_6{]}^{4–}$ is$18,000 {\mathrm{cm}}^{–1}$$.$The $\mathrm{CFSE}$ for tetrahedral $[{\mathrm{CoCl}}_4{]}^{2–}$will be

Which of the following complex compounds will exhibit highest paramagnetic behaviour?

(At. No. : $\mathrm{Ti}=22, \mathrm{Cr}=24, \mathrm{Co}=27, \mathrm{Zn}=30$ )