Organic Compounds Containing Nitrogen: JEE Main 2026 Chemistry question

'A' is a neutral organic compound (M. F : $\mathrm{C_8H_9ON}$). On treatment with aqueous $\mathrm{Br_2/HO^{(-)}}$, 'A' forms a compound 'B' which is soluble in dilute acid. 'B' on treatment with aqueous $\mathrm{NaNO_2}$ / HCl (0-5 °C) produces a compound 'C' which on treatment with CuCN/NaCN produces 'D'. Hydrolysis of 'D' produces 'E' which is also obtainable from the hydrolysis of 'A'. 'E' on treatment with acidified $\mathrm{KMnO_4}$ produces 'F'. 'F' contains two different types of hydrogen atoms. The structure of 'A' is