Chemistry - Nomenclature Question with Solution | TestHub

Butan-2-one: $\mathrm{C}=\mathrm{O}$ on ${\mathrm{C}}_2$. Phenyl on ${\mathrm{C}}_3$ and $\mathrm{OH}$ on ${\mathrm{C}}_4$ (the end carbon away from the $\mathrm{C}{\mathrm{H}}_3$).

Only the structure $\mathrm{C}{\mathrm{H}}_3-\mathrm{CO}-\mathrm{CH}(\mathrm{Ph})-\mathrm{C}{\mathrm{H}}_2\mathrm{OH}$ matches.