Compound $X$, $\text{C}_6\text{H}_{12}\text{O}$, is oxidised by acidified sodium dichromate(VI) to form compound $Y$. Compound $Y$ then reacts with ethanol, in the presence of a small amount of concentrated sulfuric acid, producing liquid $Z$. What is the formula of $Z$?
- A$\text{CH}_3(\text{CH}_2)_4\text{COCH}_2\text{CH}_3$
- B$\text{CH}_3(\text{CH}_2)_4\text{CO}_2\text{CH}_2\text{CH}_3$
- C$\text{CH}_3\text{CH}_2\text{CO}_2(\text{CH}_2)_4\text{CH}_3$
- D$\text{CH}_3\text{CO}_2(\text{CH}_2)_5\text{CH}_3$