1-(4-Hydroxyphenyl)ethan-1-one is subjected to various tests. Select the tests that give a positive result.

The phenolic $-\mathrm{OH}$ gives the violet iron complex, and the methyl ketone $\mathrm{CH}{}_3-\mathrm{CO}-\mathrm{Ar}$ unit undergoes the iodoform (haloform) reaction. The compound is a ketone, not an aldehyde, so Tollens reagent is not reduced, and the phenolic $-\mathrm{OH}$ is too weakly acidic to release $\mathrm{CO}{}_2$ from bicarbonate.