When answering this question, both structural isomerism and stereoisomerism need to be taken into account. Y is a gaseous hydrocarbon that turns aqueous bromine colourless. $10.0\,\text{g}$ of Y occupies a volume of $3.43\,\text{dm}^3$ under room conditions. What number of isomeric structures can Y have?
- A4
- B5
- C6
- D7