An organic compound \( (X) \) with molecular formula \( \mathrm{C_3H_6O} \) is not readily oxidized. On reduction it gives \( \mathrm{C_3H_8O} \) \( (Y) \) which reacts with \( \mathrm{HBr} \) to give a bromide \( (Z) \) which is converted to Grignard reagent. This Grignard reagent on reaction with \( (X) \) followed by hydrolysis give \( 2, 3 \)-dimethylbutan-\( 2 \)-ol. Compounds \( (X) \), \( (Y) \) and \( (Z) \) respectively are:
