GKFix MCQ Question

What is the correct order of increasing energy for the following orbitals: 4p, 5s, 4d, 4f?

• A. 4p < 4d < 5s < 4f
• B. 4p < 5s < 4f < 4d
• C. 5s < 4p < 4d < 4f
• D. 4p < 5s < 4d < 4f