Identify $\mathrm{A}$ and $\mathrm{B}$ from the following reactions (I) $\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_3 \frac{\text { (i) } \mathrm{O}_3}{\text { (ii) } \mathrm{Zn}-\mathrm{H}_2 \mathrm{O}} 2 \mathrm{X}$

• A

  $\mathrm{CH}_3-\mathrm{CHO}+\mathrm{HCHO}$
• Correct answer
  B

  
  
• C

  $\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CHO}+\mathrm{CH}_2 \mathrm{O}$
• D

  
  

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