In aqueous solution, `Cr^(2+)` is stronger reducing agent than `Fe^(2+)`. This is because

Options

A. ` Cr^(2+)` ion is more stable than `Fe^(2+)`
B. `Cr^(3+)` ion with `d^3` configuration has favourable crystal field stabilisation energy
C. `Cr^(3+)` has half-filled configuration and hence more stable
D. `Fe^(3+)` in aqueous solution is more stable than `Cr^(3+)` .