Which of the following give a coloured complex with neutral $\mathrm{FeCl}{}_3$ solution?

Phenol is itself an enol. Ethyl acetoacetate and pentane-2,4-dione exist partly as enols (about 8 and 80 percent) and form coloured chelates with $\mathrm{Fe}{}^{3+}$. Propanone has an enol content around $10^{-6}$ percent, too small for the test to be positive.