Which of the following pair of transition metal ions, have the same calculated values of magnetic moment?

Question

\[\begin {array} {1 1} (a)\;Ti^{2+}\;and \; V^{2+} & \quad (b)\;Fe^{2+}\;and \; Cu^{2+} \\ (c)\;Cr^{2+}\;and \; Fe^{2+} & \quad (d)\;Co^{2+}\;and \; Ti^{2+} \end {array}\]