When compound Q is treated with $2,4$-dinitrophenylhydrazine, a precipitate forms. Compound Q does not form a precipitate on warming with Fehling’s solution. What might compound Q be?
- A$\text{CH}_3\text{COCH}_3$
- B$\text{CH}_2(\text{OH})\text{CH}_2\text{CH}_3$
- C$\text{CH}_3\text{CH}_2\text{CO}_2\text{H}$
- D$\text{CH}_3\text{CH}_2\text{CHO}$