For the energy levels in an atom which one of the following statements is/are correct?

## ✅ Correct Answer: **A,D** ### 📖 Detailed Explanation: **Solution:** This question has **multiple correct answers**. **Analyzing each option:** (A) ✓ 4f subshell has maximum 14 electrons.... (B) ✗ The 2nd principal energy level can have 4 sub energy levels ... (C) ✗ The M energy level can have a maximum of 32 electrons... (D) ✓ The 4s sub energy level is at lower energy than the 3d sub e... **Correct Options: A,D** **Approach:** - Evaluate each statement independently - Multiple options can be correct simultaneously - Check all options against atomic structure principles **Answer: A,D** --- *This is an official solution provided by Chem Mantra. For more chemistry questions and solutions, explore our [question bank](/courses).*