`ZnO` when heated with `BaO` at `1100^(@)C` gives a compound. Identify the compound

Philosopher's wool when heated with BaO at 100^(@)C gives the compounds:

Philosopher's wool when heated with BaO at 100^(@)C gives the compounds:

Philosopher's wool when heated with Bao at 1100°C gives the compound:

An organic compound A’ with molecular formula C_(7)H_(7)NO reacts with Br_(2) /aqKOH to give compound B’, which upon reaction with NaNO_(2) & HCl" at "O^(@) C gives C’. Compound C’ on heating with CH_(3)CH_(2)OH gives a hydrocarbon D’. Compound B’ on further reaction with Br_(2) water gives white precipitate of compound E’. Identify the compound A, B, C, D&E, also justify your answer by giving relevant chemical equations.