Answer:
The stereoisomer of trans-1,2-dimethylcyclopropane.
Explanation:
Stereoisomers share the same connectivity and differ only in the way their atoms are arranged in space.
The stereoisomer of trans-1,2-dimethylcyclopropane is cis-1,2-dimethylcyclopropane.
The structure of both the isomers is shown below:
