Chemistry - STEREO ISOMERISM Question with Solution | TestHub

Option (A): Converting both structures to their standard configurations shows they have different configurations at one chiral center, making them diastereomers (Correctly matched).

Option (B): The first Newman projection represents the $(2R,3R)$ enantiomer of tartaric acid (both $-OH$ groups are on the right side in the Fischer projection). The second Newman projection represents the $(2S,3S)$ enantiomer (both $-OH$ groups are on the left side). Since they are non-superimposable mirror images, they are enantiomers, not identical. Thus, (B) is incorrectly matched.

Option (C): The positions of the $-Br$ and $-Cl$ groups are switched between carbon-2 and carbon-3, making them positional isomers (Correctly matched).

Option (D): One is a threo form and the other is an erythro form, making them diastereomers (Correctly matched).