Elements A,B,C,D and E gave the following electronic configuration:
A `1s^2 , 2s^2 , 2p^1`
B `1s^2 2s^2 2p^6 3s^2 3p^1`
C `1s^2 2s^2 2p^6 3s^2 3p^3` D `1s^2 2s^2 2p^6 3s^2 3p^5`
E `1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 `
Which among these will belong to the same group in the periodic table?

Explanation

Out of these elements A and B will belong to the same group of the periodic table because they have same outer electronic configuration `ns^2 np^1`