Explanation:
Stereoisomers are compounds that have the same molecular formula and connectivity but differ in their spatial arrangement. There are three types of stereoisomers: enantiomers, diastereomers, and meso compounds.

Enantiomers:
Enantiomers are stereoisomers that are non-superposable mirror images of each other. They have opposite configurations at every chiral center in the molecule. Enantiomers have identical physical properties (such as boiling point, melting point, and solubility) but differ in their interaction with plane-polarized light. Enantiomers rotate the plane of polarized light in equal but opposite directions.

Diastereomers:
Diastereomers are stereoisomers that are not mirror images of each other and have different configurations at one or more chiral centers in the molecule. Unlike enantiomers, diastereomers have different physical properties and different chemical reactivity. For example, diastereomers may have different boiling points, melting points, and solubilities. Diastereomers can be identified by having at least one chiral center with opposite configurations and at least one chiral center with the same configuration.

Meso Compounds:
Meso compounds are a special type of diastereomer that contain chiral centers but are optically inactive. They possess an internal plane of symmetry, which allows for the superposition of two halves of the molecule. Meso compounds have identical configurations at some chiral centers and opposite configurations at others, resulting in overall optical inactivity.

Conclusion:
In this question, the correct answer is diastereomers (option B) because diastereomers are stereoisomers that are not mirror images of each other and have different configurations at one or more chiral centers. Enantiomers (option A) are mirror image isomers, and meso compounds (option C) are a specific type of diastereomer that are optically inactive due to internal symmetry. Therefore, the only option that fits the given criteria is diastereomers.