Final answer:
The relationship between ( )-neomenthol and (-)-menthol is that they are diastereomers, which means they have more than one chiral center and are not mirror images of each other.
Step-by-step explanation:
The relationship between ( )-neomenthol and (-)-menthol is that they are diastereomers. Diastereomers are a type of stereoisomerism where molecules have two or more chiral centers and are not mirror images of each other. This is different from enantiomers, which are non-superimposable mirror images and must have a chiral center with four different atoms or groups attached to it. As ( )-neomenthol and (-)-menthol are different compounds with different chiral centers, they are diastereomers. Since enantiomers require a molecule to have at least four different atoms or groups connected to a central carbon, and ( )-neomenthol and (-)-menthol do not fit this description, option b, diastereomers, is the correct answer.