$\mathrm{CH}_3 \mathrm{CH}=\mathrm{CH}_2 \xrightarrow[\mathrm{H}_2 \mathrm{O}_2 / \mathrm{OH}^{-}]{\mathrm{NaBD}_4}$ Product $X, X$ is

• A

  
  
• Correct answer
  B

  
  
• C

  
  
• D

  None of these

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