When answering this question, you should take both structural isomerism and stereoisomerism into account. P has the molecular formula $\text{C}_5\text{H}_{10}\text{O}$. P gives an orange precipitate with 2,4-dinitrophenylhydrazine (2,4-DNPH reagent). How many isomeric structures are possible for P?
- A5
- B6
- C7
- D8