c
The splitting is affected by the oxidation state of the central metal ion. A higher oxidation state leads to larger spitting hence.

\({\Delta _0}\) of \({{[Ti{{({{H}_{2}}O)}_{6}}]}^{3+}}>\) \({\Delta _0}\) of \({{[Ti{{({{H}_{2}}O)}_{6}}]}^{2+}}\) Further \({\Delta _0}\) also depends of \(Z_{eff.}\) and \(Z_{eff.}\) of \(4d\) series is more than \(3d\) series.

Hence

\({\Delta _0}\) of  \({{[Cr{{({{H}_{2}}O)}_{6}}]}^{2+}}<\) \({\Delta _0}\) of  \(\,{{[Mo{{({{H}_{2}}O)}_{6}}]}^{2+}}\)