The outer electronic structure of lawrencium (atomic number $103$) is

• A
  $Rn\, 5f^{13} \,7s^2 \,7p^2$
• B
  $Rn\, 5f^{13} \,6d^1 \,7s^1 \,7p^2$
• C
  $Rn\, 5f^{14} \,7s^1 \,7p^2$
• D
  $Rn\, 5f^{14} \,6d^1 \,7s^2$