The ketone shown is treated with excess $\mathrm{I}{}_2$ in aqueous NaOH, warmed, and the mixture is then acidified; the organic acid formed is isolated. How many 1H NMR signals does that acid give (the acid O-H counts)? Chemically equivalent hydrogens give one signal; ignore coupling and axial/equatorial differences.

1. A$2$
2. B$3$
3. C$4$
4. D$5$