[ P ] on treatment with Br_2 / FeBr_3 in CCl_4 produced a single isomer C_8 H_7 O_2 Br while heating [ P ] with sodalime gave toluene. The compound […

$\displaystyle [\mathrm{P}]$ on treatment with $\displaystyle \mathrm{Br}_2 / \mathrm{FeBr}_3$ in $\displaystyle \mathrm{CCl}_4$ produced a single isomer $\displaystyle \mathrm{C}_8 \mathrm{H}_7 \mathrm{O}_2 \mathrm{Br}$ while heating $\displaystyle [\mathrm{P}]$ with sodalime gave toluene. The compound $\displaystyle [\mathrm{P}]$ is :