An alcohol,$X$ $(C_5H_{12}O)$ in the presence of $Cu / 573 \ K$ gives $Y$ $(C_5H_{10})$. The reactants required for the preparation of $X$ are
- A$(CH_3)_2C=O, \quad C_2H_5MgBr$
- B$HCHO, \quad (CH_3)_3CMgBr$
- C$CH_3CH_2COCH_3, \quad CH_3MgBr$
- D$CH_3CH_2CHO, \quad (CH_3)_2CHMgBr$
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