Which of the following is a carcinogen?

The major product obtained in the reaction of toluene with $1-$bromo$-2-$methylpropane in the presence of anhydrous $AlCl_3$ is

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

Predict the major product of the following reaction:
Benzene + Acetic anhydride $\xrightarrow{AlCl_3}$ ?

Match the following reactions in List-$I$ with their corresponding products in List-$II$:
List-$I$ (Reaction):
$A$. $\text{Benzene} + Cl_2 \xrightarrow{AlCl_3}$
$B$. $\text{Benzene} + CH_3Cl \xrightarrow{\text{anhyd. } AlCl_3}$
$C$. $\text{Benzene} + R-CO-Cl \xrightarrow{\text{anhyd. } AlCl_3}$
$D$. $\text{Toluene} \xrightarrow{(i) KMnO_4/KOH, (ii) H_3O^+}$
List-$II$ (Product):
$I$. $\text{Benzoic acid}$
$II$. $\text{Alkyl phenyl ketone}$
$III$. $\text{Chlorobenzene}$
$IV$. $\text{Toluene}$

The total number of compounds from the list below that,when treated with hot $KMnO_4$,yield benzoic acid is: