Choose all correct statements about the compound shown.

The compound is 2-hydroxybenzaldehyde (salicylaldehyde). The ortho $\mathrm{CHO}$ and $\mathrm{OH}$ groups form an intramolecular hydrogen bond, which makes it steam volatile (A). The free phenolic group gives a violet colour with $\mathrm{FeCl}{}_3$ (B), and the aldehyde reduces Tollens reagent (C). The phenolic $\mathrm{OH}$ is acidic enough to dissolve in $\mathrm{NaOH}$, so D is wrong.