Answer:
A
Step-by-step explanation:
Nitrogen is an atom made up of 7 electrons. 
To draw the orbital energy level diagram, let us write the orbital notation of the atom;
 7 electrons of Nitrogen: 
 1s² 2s² 2p³ 
So, 
 The orbital notation diagram is : 
 1s² 2s² 2p³ 
 ↑↓ ↑↓ ↑↑↑