Which of the following product is not obtained by the Chlor-alkali process?

The process of electrolysis of sodium chloride solution is called chlor-alkali process. It is named so because of the products formed, chlor for chlorine and alkali for sodium hydroxide. The three useful products obtained by the Chlor-alkali process are chlorine, hydrogen and sodium hydroxide. Hence, Carbon dioxide is not obtained in the Chlor-alkali process.