Benzene vapour mixed with air when passed over $V_2O_5$ catalyst at $775 \ K$ gives

Given below are two statements:
Statement $I$: Tropolone is an aromatic compound and has $8 \pi$ electrons.
Statement $II$: $\pi$ electrons of $ > C = O $ group in tropolone is involved in aromaticity.
In the light of the above statements,choose the correct answer from the options given below:

Number of $\pi$-bonds present in $B.H.C.$ ($Benzene$ $hexachloride$) are

The number of disubstituted products of benzene is

Which of the following compounds is/are aromatic?

The rate-determining step for the preparation of nitrobenzene from benzene is: