An organic compound (A) having M.F C7 H9 N on treatment with NaNO2 and HCl at room temperature forms another compound (B), C7 H8 O. When (A) or (B) is treated with bromine water, they form dibromo derivatives, When (A) is reacted with chloroform and alkali, it forms (C) having the molecular formula C8 H7 N. Hydrolysis of (C) followed by reaction with NaNO2 and HCl at low temperature and subsequent reaction with HCN in the presence of Cu (D), which is isomeric to (C). (D) on hydrolysis followed by oxidation gives a dibasic acid which on halogenation forms only one monohaloderivative. Identify the compounds (A) to (E)
