Answer : Option 3) K : 2-6-8-3
Explanation : The element which is paired with an excited state electron configuration for an atom of the element is Potassium (K).
Potassium has atomic number as 19. According to 2-8-8 Rule the shell 'K' can accommodate only 2 electrons. Shell 'L' will have 8 electrons in it and Shell 'M' will have another 8 electrons in it. Shell 'N' will have 1 electron.
As it is ground state it will have 2-8-8-1 electron configuration. In excited state, it will have the electron configuration as 2-6-8-3.
Rest all the other options has the electron configuration similar to their ground state
