$p$ -Nitro toluene on further nitration give

Directions: Each of these questions contain an assertion followed by reason. Read them carefully and answer the question on the basis of the following options. You have to select the one that best describes the two statements.

Assertion: Rates of nitration of benzene and hexadeuterobenzene are different.
Reason: $\mathrm{C}-\mathrm{H}$ bond is stronger than $\mathrm{C}-\mathrm{D}$ bond.

Directions: Each of these questions contain an assertion followed by reason. Read them carefully and answer the question on the basis of the following options. You have to select the one that best describes the two statements.

Assertion: Benzene reacts with chlorine in the presence of bright light to form an insecticide $\mathrm{BHC}$ or gammexane.

Reason: In the formation of gammexane, benzene undergoes an aromatic electrophilic substitution.

Directions: Each of these questions contain an assertion followed by reason. Read them carefully and answer the question on the basis of the following options. You have to select the one that best describes the two statements.

Assertion: $p-{\mathrm{O}}_2\mathrm{N}-{\mathrm{C}}_6{\mathrm{H}}_4{\mathrm{COCH}}_3$ is prepared by Friedel-Crafts's acylation of nitrobenzene.

Reason: Nitrobenzene easily undergoes electrophilic substitution reaction.