Butan-2-one undergoes reaction with alkaline $\text{I}_2\text{(aq)}$. After that, excess dilute sulfuric acid is added to the reaction mixture. The organic products formed in this reaction sequence are triiodomethane and product M. What is product M?
- Aethanoate ion
- Bethanoic acid
- Cpropanoate ion
- Dpropanoic acid