Question: 4. Propionaldehyde (starting material) was treated with an unknown Grignard reagent and then water. The mass spectrum shows that the formula of product A is

4. Propionaldehyde (starting material) was treated with an unknown Grignard reagent

4. Propionaldehyde (starting material) was treated with an unknown Grignard reagent and then water. The mass spectrum shows that the formula of product A is C5H12O. Product A has the following 1H NMR. Circle the correct structure on the right of product A

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