An alkyl halide with molecular formula C6H13Br on dehydro halogenation gave two isomeric alkenes X and Y with molecular formula C6H12. On reductive Ozonolysis, X and Y gave four compounds CH3COCH3,CH3CHO,CH3CH2CHO and (CH3)2 CHCHO. The alkyl halide is
3 - Bromo - 2 - methyl pentane