Which one of the following compounds will react with methyl magnesium iodide?

• A

  $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}$
• B

  
• C

  
• Correct answer
  D

  

Solution

due to the presence of acidic hydrogen (hydrogen attached to triply bonded carbon atom) terminal alkyne $(d)$ will react with methyl magnesium bromide.

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