Standard free energy of formation for `Al_(2)O_(3)` and `Cr_(2)O_(3)` at `1273 K` are `-827 kJ mol^(-1) (of O_(2))` and `-540 kJ mol^(-1) (of O_(2))`, respectively.
`Al` can reduce `Cr_(2)O_(3)` to `Cr` since, `Delta_(r) G^(Ө)` is negative.

Options

A. If both (A) and ( R) are correct and ( R) is the correct explanation of (A).
B. If both (A) and ( R) are correct, but ( R) is not the correct explanation of (A).
C. If (A) is correct, but ( R) is incorrect.
D. If (A) is incorrect, but ( R) is correct.

Answer

A