Benzene was discovered by

Which of the following has the lowest knocking property?

Which of the following would be most reactive towards nitration?

The compound '$A$' with molecular formula $C_8H_{10}$ (aromatic) which gives $1$ mononitro substituted product and $3$ dinitro substituted products is:

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.

Which is the major product "$Z$" in the following reaction?