Salicylic acid is treated with excess aqueous $\mathrm{NaHCO}{}_3$. The first $\mathrm{p}{K}_a$ (carboxylic acid) is 2.97 and the second (phenolic $\mathrm{OH}$ in the salicylate anion, which is intramolecularly hydrogen-bonded) is 13.6. Given $\mathrm{p}{K}_a(\mathrm{H}{}_2\mathrm{CO}{}_3)=6.4$, the main product is

1. Adisodium 2-oxidobenzoate, with release of $\mathrm{CO}{}_2$
2. Bsodium 2-hydroxybenzoate (phenolic $\mathrm{OH}$ unchanged), with release of $\mathrm{CO}{}_2$
3. Csodium 2-hydroxybenzoate without release of $\mathrm{CO}{}_2$
4. Dno reaction