Which one of the following pairs of ions have the same electronic configuration?

Options

A. `Cr^(3+), Fe^(3+)`
B. `Fe^(3+), Mn^(2+)`
C. `Fe^(3+), Co^(3+)`
D. `Sr^(3+), Cr^(3+)`

Answer

B

Explanation

`._(26)Fe^(3+) = [Ar]^(18) 3d^(5)`, `._(25)Mn^(2+) = [Ar]^(18).3d^(5)`