Which of the following type of protons are chemically non-equivalent?

Question

Quizplus · Accepted Answer

Diastereotopic protons are chemically non-equivalent because they are bonded to atoms that have different three-dimensional arrangements due to stereochemistry, resulting in different chemical shifts in an NMR spectrum. Homotopic protons are chemically equivalent because they are in identical environments, and enantiotopic protons are in mirror-image environments and will have the same chemical shift in an achiral environment.

Which of the Following Type of Protons Are Chemically Non-Equivalent