Identify the reagents $X$,$Y$,and $Z$ in the following reaction schemes:
$(i)$ Benzene $\xrightarrow{X}$ Benzenesulfonic acid $\xrightarrow{Y}$ Sodium phenoxide $\xrightarrow{Z}$ Phenol
$(ii)$ Aniline $\xrightarrow{X}$ Benzenediazonium chloride $\xrightarrow{Y}$ Phenol
$(iii)$ Chlorobenzene $\xrightarrow{X}$ Sodium phenoxide $\xrightarrow{Y}$ Phenol

• A
  $X = \text{conc. } H_2SO_4, Y = NaOH, Z = H_3O^+$; $X = NaNO_2/HCl, Y = H_2O/\Delta$; $X = NaOH, Y = H_3O^+$
• B
  $X = SO_3, Y = NaOH, Z = H_2O$; $X = NaNO_2, Y = H_2O$; $X = NaOH, Y = H_2O$
• C
  $X = H_2SO_4, Y = Na_2CO_3, Z = H^+$; $X = HNO_2, Y = H_2O$; $X = Na, Y = H^+$
• D
  $X = H_2SO_4, Y = NaOH, Z = H_2O$; $X = NaNO_2/HCl, Y = H_3O^+$; $X = NaOH, Y = H_3O^+$