Electronic configuration of an element 13 in the subsidiary energy level is

• A \( 1s^2 2s^2 2p^6 3s^2 3p^1 \)
• B \( 1s^22s^2 2p^4 3p^1 3s^1 \)
• C \( 1s^2 2s^2 2p^6 3s^2 3p^3 \)
• D \( 1s^1 2s^2 2p^6 3s^2 3p^4 \)