Amongst the following ions which one has the highest magnetic moment value? \[\left( i \right)\text{ }{{[Cr{{({{H}_{2}}O)}_{6}}]}^{3+}}\left( ii \right)\text{ }{{[Fe{{({{H}_{2}}O)}_{6}}]}^{2+}}\left( iii \right)\text{ }{{[Zn{{({{H}_{2}}O)}_{6}}]}^{2+}}\]