Oxidation of which of the following by air in the presence of $V_2O_5$ gives phenol?

In the following reaction,
$X \xrightarrow[(ii) \text{ aq. acid}]{(i) \text{ O}_2, \text{ catalyst, heat}} \text{Phenol} + Y (C_6H_{10}O)$
$X$ and $Y$ respectively,are $......$

Describe the methods and processes for the production of phenol.

In the given reaction,identify $A$:
$C_6H_5-CH(CH_3)_2 + O_2$ $\rightarrow A$ $\xrightarrow{H_2O/H^+} C_6H_5OH + CH_3COCH_3$

Identify product $C$ in the following reaction sequence:
Nitrobenzene $\xrightarrow{Sn+HCl} A$ $\xrightarrow{HNO_2, 0^{\circ}C-5^{\circ}C} B$ $\xrightarrow{H_2O, \Delta} C$

In the preparation of phenol from cumene in the presence of air,the intermediate formed is: