In a test tube containing a salt, a few drops of dilute $\text{H}_2\text{SO}_4$ were added, which gave colourless vapours having the smell of vinegar. The vapours turned the blue litmus paper red. Identify the correct anion from the following:
- ACarbonate, $\text{CO}_3^{2-}$
- BSulphide, $\text{S}^{2-}$
- CAcetate, $\text{CH}_3\text{COO}^-$
- DSulphate, $\text{SO}_4^{2-}$
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