Primary amines react with nitrous acid to yield

The correct order of basicity for the following molecules is $:$

Assertion $(A)$: $-NH_2$ group of aniline is ortho,para directing in electrophilic substitutions.
Reason $(R)$: $-NH_2$ group stabilises the arenium ion formed by the ortho,para attack of the electrophile.
The correct answer is

Which one of the following compounds undergoes bromination of its aromatic ring (electrophilic aromatic substitution) at the fastest rate?

Which of the following conversions is a Hofmann elimination reaction?

If aniline is treated with conc. $H_{2}SO_{4}$ and heated at $200^{\circ}C$, the product is