The ground state electronic configuration of a nitrogen atom $(Z = 7)$ can be represented by which of the following orbital diagrams?

• A

  $1s^2, 2s^2, 2p_x^1, 2p_y^1, 2p_z^1$

  $\uparrow\downarrow$ $\uparrow\downarrow$ $\uparrow$ $\uparrow$ $\uparrow$

• B

  $\uparrow\downarrow$ $\uparrow\downarrow$ $\uparrow$ $\downarrow$ $\uparrow$

• C

  $\uparrow\downarrow$ $\uparrow\downarrow$ $\downarrow$ $\downarrow$ $\downarrow$

• D
  None of these