Carboxylic acids react with alcohols to form esters. Carboxylic acid X produces just one ester with molecular formula $\text{C}_5\text{H}_{10}\text{O}_2$. What might X be?
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct