Compound X, $\text{CH}_3\text{CH(OH)CH(CHO)CH}_3$, is refluxed with an excess of acidified $\text{K}_2\text{Cr}_2\text{O}_7$ so that compound Y is produced. X and Y are then each warmed separately with Fehling’s solution and the observations recorded. What are the observations?
- ABoth X and Y give a red precipitate.
- BOnly X gives a red precipitate.
- COnly Y gives a red precipitate.
- DNeither X nor Y gives a red precipitate.