In stereochemistry, which statement correctly describes the concept of topicity and its application in the assignment of stereochemical relationships? A) Topicity refers to the spatial relationship between atoms in a molecule and is used to assign R/S configuration to chiral centers. B) Homotopic atoms or groups in a molecule exhibit identical chemical shifts in NMR spectroscopy and their replacement leads to achiral molecules. C) Enantiotopic atoms or groups in a molecule are mirror images and their replacement always results in diastereomers. D) Distopic atoms or groups in a molecule are always located in different environments and their replacement leads to enantiomers. Don't use chat gpt.