Which of the following compound is expected to be optically active?

• A

  $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCHO}$
• B

  $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CHO}$
• Correct answer
  C

  $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHBrCHO}$
• D

  $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CBr}_{2} \mathrm{CHO}$

Solution

The compound having chiral centre, $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHBrCHO}$ is expected to be optically active.

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