Which of the following can not react with Bayer's reagent?

The reaction $2 C_6H_6 + CH_2Cl_2 \xrightarrow{AlCl_3, \Delta} ?$ gives the major product:

In the mixture of conc. $H_2SO_4$ and $HNO_3$,the nitrating species is:

The order of reactivity of the following compounds towards electrophilic substitution will be - [where $\phi = C_6H_5$]:
$I. \phi-CH_3$
$II. \phi-CH_2-CH_3$
$III. \phi-CH(CH_3)_2$
$IV. \phi-C(CH_3)_3$

The products $P$ and $Q$ in the following sequence of reactions are:
$p$-Methylanisole $\xrightarrow{Li, EtOH, NH_3(l)} P$ $\xrightarrow[(ii) -78^{\circ}C, Me_2S]{(i) O_3 (1 \text{ equiv.})} Q$

In the reaction $C_6H_5CH_3$ $\xrightarrow{\text{Oxidation}} A$ $\xrightarrow{NaOH} B$ $\xrightarrow{\text{Sodalime}} C$. Then $C$ is