AIIMS 2018 Chemistry Enantiomers MCQ Question

Option A is correct because it represents a pair of molecules that are superimposable on each other, meaning they are identical rather than enantiomers. Enantiomers are characterized by having chiral centers, resulting in non-superimposable mirror images; thus, pairs B, C, and D all consist of chiral molecules that exhibit this property. In contrast, option A lacks this chirality, confirming that it does not form an enantiomeric pair. Understanding the concept of chirality and superimposability is crucial in distinguishing between enantiomers and identical molecules.