Product $(A)$ is

Identify the major product $A$ formed in the following Kolbe's electrolysis reaction:

In which of the following compounds does electrophilic aromatic substitution take place in the phenyl ring present on the left-hand side?

What is the decreasing order of reactivity amongst the following compounds towards aromatic electrophilic substitution?
$I.$ Chlorobenzene
$II.$ Benzene
$III.$ Anilinium chloride
$IV.$ Toluene

Among the following compounds $(I-III)$,the correct order of reactivity towards electrophilic substitution reaction is:

Assertion : Benzene exhibits two different bond lengths, due to $C-C$ single and $C=C$ double bonds.
Reason : Actual structure of benzene is a hybrid of the following two structures.