The correct structure of benzene was proposed by

What is the number of $\sigma$ and $\pi$ bonds in toluene?

Which of the following processes is reversible?

What are the various steps of electrophilic substitution of benzene?

The reaction sequence is as follows:
$1,4-dibromocyclohex-2-ene$ $\xrightarrow[{2 \, molar \, equivalent}]{{(CH_3)_2NH}} (A)$ $\xrightarrow{{BaO}} (B)$ $\xrightarrow[{ (2 \, molar \, equivalent) }]{{CH_3I}} (C)$ $\xrightarrow{{Ag_2O \, / \, H_2O}} (D) + 2(CH_3)_3N$
Identify the end product $(D)$ in the given sequence.

Arrange the following compounds in increasing order of their reactivity towards electrophilic substitution: