Identify compound A from following reaction $\mathrm{A}+\mathrm{C}_2 \mathrm{H}_5 \mathrm{MgBr} \underset{\text { ether }}{\stackrel{\text { dir }}{\longrightarrow}} \mathrm{B} \stackrel{\mathrm{H}_3 \mathrm{O}^{+}}{\longrightarrow} 3-$ methylpen tan-3-ol

• A

  Butanal
• B

  Propanone
• C

  Propanal
• Correct answer
  D

  Butanone

Hence, the correct answer is option: 'D'.