Benzene is obtained from

What will be the major product in the following reaction?

$A$ compound $X$ formed after heating coke with lime reacts with water to give $Y$,which on passing over red-hot iron at $873 \ K$ produces $Z$. The compound $Z$ is

Among the following,the set which represents aromatic species is:

What is the product formed when ethylbenzene is oxidized by $KMnO_4$?

$Benzene$ $\xrightarrow[H_2SO_4]{HNO_3} (A)$ $\xrightarrow[FeCl_3]{Cl_2} (B)$
The major product $(B)$ is