The list shows four methods that were suggested for the formation of carbon dioxide. <br/>1 - action of an alkali on a carbonate<br/> 2-action of heat on a carbonate<br/>3- complete combustion of methane <br/>4-reaction of a carbonate with oxygen. <br/>Which methods would result in the production of carbon dioxide?

• ACO
• B$CH_4$
• CNO
• D$SO_2$

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