Chlorobenzene $(X)$ when reacted with reagent '$A$' gets converted to phenol $(Y)$. The major product obtained from nitration of $X$ gets converted to $p$-nitrophenol $(Z)$ by reaction with reagent $B$. What are $A$ and $B$ respectively?

• A
  $A = (i) \ NaOH, 623 \ K, 300 \ atm \ (ii) \ H^{+}; \ B = (i) \ NaOH, 443 \ K \ (ii) \ H^{+}$
• B
  $A = (i) \ NaOH, 443 \ K \ (ii) \ H^{+}; \ B = H_2O, \Delta$
• C
  $A = (i) \ NaOH, 323 \ K \ (ii) \ H^{+}; \ B = (i) \ NaOH, 443 \ K \ (ii) \ H^{+}$
• D
  $A = (i) \ NaOH, 623 \ K, 300 \ atm \ (ii) \ H^{+}; \ B = H_2O, \Delta$