Out of the following, how many of them have magnetic moment value $\sqrt{24}\mathrm{BM}\text{. }$

${\mathrm{Ti}}^{2+},{\mathrm{Ti}}^{3+},{\mathrm{V}}^{2+},{\mathrm{Cr}}^{2+},{\mathrm{Cr}}^{3+},{\mathrm{Mn}}^{2+},{\mathrm{Fe}}^{2+}$