Which of the following statements is wrong ?
A. `Ti^(4+) and Ag^(+)` are repelled by magnetic field.
B. `Mn^(2+)` shows maximum magnetic character among the first transition series.
C. `Fe^(2+)` is more stavle than `Mn^(2+)` towards oxidation to + state.
D. Cr in `Cr_2O_7^(2-)` ion involves `sp^3d^2` hydridisation.
