Identify the most suitable reagents $(I)$ and $(II)$ for the following sequence of reactions:

  • A
    $I = \text{conc. } H_2SO_4, II = HBr$
  • B
    $I = \text{aq. } KOH, II = HBr / \text{peroxide}$
  • C
    $I = \text{alc. } KOH, II = HBr / \text{peroxide}$
  • D
    $I = \text{alc. } KOH, II = HBr$

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