Carbonyl Compounds Questions

Compound (A), ${\text{C}}_8{\text{H}}_9\text{Br}$, gives a white precipitate when warmed with alcoholic ${\text{AgNO}}_3$. Oxidation of (A) gives an acid (B), ${\text{C}}_8{\text{H}}_6{\text{O}}_4$. (B) easily forms anhydride on heating. Identify the compound (A).