The reaction: $\left(\mathrm{CH}_3\right)_3 \mathrm{C}-\mathrm{Br} \stackrel{\mathrm{H}_2 \mathrm{O}}{\longrightarrow}\left(\mathrm{CH}_3\right)_3-\mathrm{C}-\mathrm{OH}$

• A

  elimination reaction
• Correct answer
  B

  substitution reaction
• C

  free radical reaction
• D

  displacement reaction

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