An introduction to AS Level organic chemistry — practice question

The skeletal formula for compound X appears below. Which row is the correct one?

• Amolecular formula of X: $\text{C}_7\text{H}_{14}\text{O}$; observation on addition of X to Fehling’s reagent: no change
• Bmolecular formula of X: $\text{C}_7\text{H}_{14}\text{O}$; observation on addition of X to Fehling’s reagent: red precipitate forms
• Cmolecular formula of X: $\text{C}_7\text{H}_{16}\text{O}$; observation on addition of X to Fehling’s reagent: no change
• Dmolecular formula of X: $\text{C}_7\text{H}_{16}\text{O}$; observation on addition of X to Fehling’s reagent: red precipitate forms