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

${\text{Fe}}^{+3}=\text{Fe atomic number }\to {\text{ 26-3 = 23e}}^{-}$

${\text{Mn}}^{+2}=\text{ Mn atomic number }\to \text{ 25}-\text{2}={\text{23e}}^{-}$

Both the ions have the same number of electrons so they pair have the same electronic configuration.