Butan-2-ol may be prepared by reducing X with $\text{H}_2/\text{Ni}$. Butan-2-ol can then be dehydrated to give Y and Z, which are structural isomers of one another. Which row is correct?
- AX is an aldehyde; cis-trans isomerism is shown by both Y and Z
- BX is an aldehyde; cis-trans isomerism is shown by only one of Y and Z
- CX is a ketone; cis-trans isomerism is shown by both Y and Z
- DX is a ketone; cis-trans isomerism is shown by only one of Y and Z