Which of the following compounds is not aromatic?

Which of the following are aromatic species?
$(A)$ Cyclohexa$-2,4-$dienyl cation
$(B)$ Naphthalene
$(C)$ Tropone (Cycloheptatrienone)
$(D)$ Cyclohexa$-1,3-$diene

Which of the following undergoes sulphonation at the fastest rate?

The number of $sp^2$ and $sp^3$ hybridised carbons in cumene,respectively,are:

Identify the correct method for the synthesis of the compound shown below from the following alternatives.

Given below are two statements $:$
Statement $(I) :$ On nitration of $m-$xylene with $HNO_3, H_2SO_4$ followed by oxidation,$4-$nitrobenzene$-1, 3-$dicarboxylic acid is obtained as the major product.
Statement $(II) :$ $-CH_3$ group is $o/p-$directing while $-NO_2$ group is $m-$directing group.
In the light of the above statements,choose the correct answer from the options given below $:$