$1$-chlorobutane on reaction with alcoholic potash gives

The reaction $CH_3-CH(C_6H_5)-CH(Br)-C_6H_5 \xrightarrow{alc.KOH} A$. Identify the product $A$.

The product formed when toluene is heated in light with $Cl_2$ and in the absence of a halogen carrier is:

Elimination reactions (especially $\beta$-elimination) are as common as the nucleophilic substitution reaction in the case of alkyl halides. Specify the reagents used in both cases.

If all the nucleophilic substitution reactions at saturated carbon atoms in the above sequence of reactions follow $S_N2$ mechanism,then $\underline{E}$ and $\underline{E}$ will be respectively,

Identify the compound $(C)$ in the following reaction sequence:
$\gamma$-butyrolactone $\xrightarrow[(ii) SOCl_2]{(i) HCl} (A)$ $\xrightarrow[AlCl_3]{Ph-H} (B)$ $\xrightarrow{KOH/MeOH} (C)$