This post includes the answer key with thorough explanations for the Atomic Spectra exercise of 50 MCQs, developed in line with the PMDC syllabus for MDCAT and NUMS preparation. The MCQs are based on repeated concepts from MDCAT and NUMS past papers, covering Bohr’s model, hydrogen emission spectrum, energy levels, and photon transitions. These detailed solutions are designed to help students from UHS, DUHS, SZABMU, KMU, JSMU, and BOLAN build strong conceptual understanding and perform confidently in medical entry tests.