Which of the following give a yellow precipitate with $\mathrm{I}{}_2$ and $\mathrm{NaOH}$?

Ethanol, $\mathrm{CH}{}_3\mathrm{CH}{}_2\mathrm{OH}$, and 1-phenylethan-1-ol, $\mathrm{C}{}_6\mathrm{H}{}_5\mathrm{CH}(\mathrm{OH})\mathrm{CH}{}_3$, are oxidised by $\mathrm{NaOI}$ to ethanal and acetophenone, which both contain $\mathrm{CH}{}_3\mathrm{CO}{}^{-}$. Pentan-3-one and propanal have no $\mathrm{CH}{}_3\mathrm{CO}{}^{-}$ group and no $\mathrm{CH}{}_3\mathrm{CH}(\mathrm{OH}){}^{-}$ precursor.