What are $A, B, C$ and $D$ in the following reactions?
$i)$ Aniline $\xrightarrow[273 \ K]{NaNO_2 \mid HCl} A$ $\xrightarrow{B} \text{Phenol}$
$ii)$ Cumene $\xrightarrow{O_2} C$ $\xrightarrow{D} \text{Phenol} + \text{acetone}$

• A
  $A$: $C_6H_5N_2^+Cl^-$,$B$: $\text{Warm } H_2O$,$C$: $C_6H_5C(CH_3)_2OOH$,$D$: $H^+/H_2O$
• B
  $A$: $C_6H_5Cl$,$B$: $623 \ K/300 \ atm$,$C$: $C_6H_5C(CH_3)_2OH$,$D$: $H_2O_2$
• C
  $A$: $C_6H_5ONa$,$B$: $H_3O^+$,$C$: $C_6H_5CH(CH_3)CH_2OOH$,$D$: $H_2O_2$
• D
  $A$: $C_6H_5NHOH$,$B$: $NaOH$,$C$: $C_6H_5OCH(CH_3)_2$,$D$: $H^+/H_2O_2$