Identify '$X$' and '$Y$' in the following sequence of transformations: $CH_3-CH_2-CH_2Br$ $\xrightarrow{X} \text{Product}$ $\xrightarrow{Y} CH_3-CH(Br)-CH_3$.

  • A
    $X = \text{dilute aqueous } NaOH, 20 \ ^\circ C, Y = HBr / \text{acetic acid } 20 \ ^\circ C$
  • B
    $X = \text{concentrated alcoholic } NaOH, 80 \ ^\circ C, Y = HBr / \text{acetic acid } 20 \ ^\circ C$
  • C
    $X = \text{dilute aqueous } NaOH, 20 \ ^\circ C, Y = Br_2 / CHCl_3, 0 \ ^\circ C$
  • D
    $X = \text{concentrated alcoholic } NaOH, 80 \ ^\circ C, Y = Br_2 / CHCl_3, 0 \ ^\circ C$

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