In the above chemical reaction sequence " \(\mathrm{A}\) " and " \(\mathrm{B}\) " respectively are

• A

  \(\mathrm{H}_2 \mathrm{O}, \mathrm{H}^{+}\)and \(\mathrm{KMnO}_4\)
• Correct answer
  B

  \(\mathrm{O}_3, \mathrm{Zn} / \mathrm{H}_2 \mathrm{O}\) and \(\mathrm{NaOH}_{(\text {alc) }} / \mathrm{I}_2\)
• C

  \(\mathrm{O}_3, \mathrm{Zn} / \mathrm{H}_2 \mathrm{O}\) and \(\mathrm{KMnO}_4\)
• D

  \(\mathrm{H}_2 \mathrm{O}, \mathrm{H}^{+}\)and \(\mathrm{NaOH}_{(\mathrm{alc})} / \mathrm{I}_2\)

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