Which electron configuration represents the electrons in an atom of sodium in the ground state at stp

Answer : The  ground state electronic configuration of sodium will be,

Explanation :

Electronic configuration : It is defined as the representation of electrons around the nucleus of an atom.  

Number of electrons in an atom are determined by the electronic configuration.

Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.

The ground state electronic configuration of sodium will be,

The total number of electrons = [2 + 2 + 6 + 1] = 11

the correct answer to this question is 2