(A) : The electronic configuration of Cr is `[Ar]3d^(5)4s^(1)` but not `[Ar]3d^(4)4s^(2)`
(R) : Lowering energy with configuration `[Ar]3d^(5) 4s^(1)` is more than that with configuration `[Ar]3d^(4)4s^(2)`

Options

A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true and (R) is not the correct explanation of (A)
C. (A) is true but (R) is false
D. (A) is false but (R) is true

Answer

A