Which of the following compounds will undergo a Friedel-Crafts alkylation reaction?

The major product formed in the reaction is:
$Isopropylbenzene + HNO_3 \xrightarrow{conc. H_2SO_4} ?$

Benzene on treatment with a mixture of conc. $HNO_3$ and conc. $H_2SO_4$ at $90^\circ C$ gives :

The most appropriate product for the following reaction is:

What are the necessary conditions for any system to be aromatic?

Given below are two statements. One is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: $[6]-$Annulene,$[8]-$Annulene and cis$-10-$Annulene are respectively aromatic,non-aromatic and non-aromatic.
Reason $R$: Planarity is one of the requirements of aromatic systems.
In the light of the above statements,choose the most appropriate answer from the options given below.