Both structural isomerism and stereoisomerism ought to be taken into account when answering this question. A colourless liquid, $\text{C}_5\text{H}_{11}\text{Cl}$, occurs as a mixture of two optical isomers. When it is heated with sodium hydroxide in ethanol, only a mixture of two alkenes is produced. What could the colourless liquid be?
- A$(\text{CH}_3\text{CH}_2)_2\text{CHCl}$
- B$\text{CH}_3\text{CH}_2\text{CH}_2\text{CHClCH}_3$
- C$\text{CH}_3\text{CH}_2\text{CCl(CH}_3)_2$
- D$(\text{CH}_3)_2\text{CHCHClCH}_3$