Let's analyze the relationship between structures (A) and (B). Since no images are displayed here, I'll explain the general approach to determine stereoisomer relationships.

Step 1: Check for Same Molecular Formula
First, verify if (A) and (B) have the same molecular formula. If not, they are not isomers. If yes, proceed.

Step 2: Check Connectivity (Structural Isomers?)
If the connectivity of atoms is different, they are structural isomers (e.g., positional, functional, chain). Positional isomers have the same functional group at different positions. Functional isomers have different functional groups.

Step 3: Check Stereochemistry (Stereoisomers?)
If connectivity is identical, they are stereoisomers. Stereoisomers include enantiomers and diastereomers.

Enantiomers: Non-superimposable mirror images. They have opposite configurations at all chiral centers.
Diastereomers: Stereoisomers that are not mirror images. They differ at some but not all chiral centers, or have geometric isomerism (cis/trans).

Step 4: Apply to (A) and (B)
Without the exact structures, consider the options:

If they have the same formula but different functional groups, it's functional isomerism.
If they are mirror images and non-superimposable, they are enantiomers.
If they are stereoisomers but not mirror images, they are diastereomers.
If they have the same functional group at different positions, it's positional isomerism.

Compare the given structures based on these rules to identify the relationship.

Final Answer: Based on common problems, if (A) and (B) are shown as non-mirror image stereoisomers (e.g., cis/trans), they are likely diastereomers. Confirm by checking mirror image property and chiral centers.

Related Topics & Formulae

Stereoisomerism: Isomers with same connectivity but different spatial arrangement. Includes enantiomers, diastereomers, and geometric isomers.

Chirality: A molecule is chiral if it is not superimposable on its mirror image. Chiral centers are often carbon atoms with four different substituents.

R/S Configuration: Used to assign absolute configuration to chiral centers. Rules based on priority of substituents.

Geometric Isomerism: In alkenes or rings, cis/trans or E/Z isomers due to restricted rotation.