Which statement concerning butanone is correct?
- AButanone can be dehydrated by concentrated sulfuric acid to give $\text{CH}_2=\text{CHCH}=\text{CH}_2$.
- BButanone gives a positive result with Tollens’ reagent.
- CButanone reacts with $\text{HCN}$ by an electrophilic addition mechanism.
- DButanone reacts with $\text{NaBH}_4$ to give a chiral product.