Sodium phenoxide when heated with ${\mathrm{CO}}_2$ under pressure at $125°\mathrm{C}$ yields a product which on acetylation produces $\mathrm{C}.$

The major product $\mathrm{C}$ would be:

The major product of the following reaction is:

The major product formed in the reaction given below will be:

The major product of the following reaction is:

The major product of the following reaction is:

 $\text{'}\mathrm{S}\text{'}$ is: