An alcohol X ($\mathrm{C}{}_4\mathrm{H}{}_{10}\mathrm{O}$) becomes turbid with Lucas reagent at room temperature only after about five minutes and gives a yellow precipitate with $\mathrm{NaOH}/\mathrm{I}{}_2$. The sodium salt of the organic acid formed in this iodoform reaction is

1. A$\mathrm{CH}{}_3\mathrm{CH}{}_2\mathrm{CH}{}_2\mathrm{COONa}$
2. B$\mathrm{CH}{}_3\mathrm{CH}{}_2\mathrm{COONa}$
3. C$\mathrm{CH}{}_3\mathrm{COONa}$
4. D$\mathrm{HCOONa}$