Based on the given information, the given structures are isomers, i.e., option B as they have different arrangements, but the same molecular formula.
What are isomers?
Isomers are organic compounds having the same molecular formula and different molecular structures.
This difference is due to varying spatial arrangement of atoms in the compounds.
Isomers of different compounds have different properties based on the molecular formula.
Thus, the correct option is B.
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