General electronic configuration of 13 group elements 

• A

  ${\mathrm{ns}}^2{\mathrm{np}}^1$

• B

  ${\mathrm{ns}}^2{\mathrm{np}}^2$

• C

  ${\mathrm{ns}}^2{\mathrm{np}}^4$

• D

  ${\mathrm{ns}}^2$