Hydrocarbons

An aromatic hydrocarbon \([\mathrm{A}]\left(\mathrm{Molecular}\right.\) formula \(\left.\mathrm{C}_9 \mathrm{H}_{12}\right)\), undergoes air oxidation followed by reaction with dil.
\(\mathrm{HCl}\) to give [B] as one of the products

Compound [B] forms a white precipitate on treatment with \(\mathrm{Br}_2(\mathrm{aq})\)

Sodium salt of [B] reacts with \(\mathrm{CO}_2\) at \(400 \mathrm{~K}\) under high pressure followed by acid hydrolysis to give [C]

Compound [C] reacts with acetic anhydride / conc. \(\mathrm{H}_2 \mathrm{SO}_4\) to form [D]
Identify compound \([\mathrm{D}]\)