Both structural isomerism and stereoisomerism must be considered when you answer this question. $Y$ is a hydrocarbon in the gaseous state that decolourises aqueous bromine. It has no ring structures. Under room conditions, $10.0\,\text{g}$ of $Y$ occupies a volume of $3.43\,\text{dm}^3$. How many different isomeric structures can $Y$ have?
- A4
- B5
- C6
- D7