Butanoic acid may be made from 1-bromopropane by using reagents X and Y, as illustrated: 1-bromopropane $\xrightarrow{\text{reagent X}}$ compound Q $\xrightarrow{\text{reagent Y}}$ butanoic acid. What could be reagents X and Y?
- AX: KCN in ethanol; Y: HCl(aq)
- BX: KCN in ethanol; Y: NaOH(aq)
- CX: NH$_3$ in ethanol; Y: HCl(aq)
- DX: NaOH(aq); Y: $\text{H}^+/\text{Cr}_2\text{O}_7^{2-}$(aq)