Identify the product $\mathrm{A}$ in the following reaction

• Correct answer
  A

  $\mathrm{H}_2 \mathrm{C}=\mathrm{CH}_2$
• B

  $\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_3$
• C

  $\mathrm{CH}_3-\mathrm{C} \equiv \mathrm{CH}$
• D

  $\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}_2$

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