Both structural isomerism and stereoisomerism need to be considered when responding to this question. The diagram shows the structure of 3-methylcyclobutene. A sample containing every stereoisomer of 3-methylcyclobutene is reacted with HBr. This gives a mixture of isomeric bromomethylcyclobutanes. How many stereoisomers can 3-methylcyclobutene form, and how many isomeric bromomethylcyclobutanes are in the product mixture?
- A2; 4
- B2; 6
- C4; 4
- D4; 8