Ethylene reacts with HBr forming ‘X’ which on reaction with moist Ag2O gives ‘Y’. When ‘Y’ is heated with alumina at 3500C compound Z is formed. Then X and Z are
(1) Bromo ethane, ethanol
(2) Ethanol, ethoxy ethane
(3) Ethyl bromide, diethyl ether
(4) Bromo ethane, Ethene