An organic compound $\mathrm{A}$, having molecular formula ${\mathrm{C}}_5{\mathrm{H}}_{11}\mathrm{ON}$, on reaction with ${\mathrm{Br}}_2/\mathrm{KOH}$ forms a compound $\mathrm{B}\left({\mathrm{C}}_4{\mathrm{H}}_{11}\mathrm{N}\right).$ Compound $\mathrm{A}$ is optically active compound. Select the correct statement.

1. Aliphatic amines preparations and properties:

2. Aniline preparations and properties:

3. Diazonium salt Preparations:

4. Chemical Properties of Diazonium salt:

(i) Nucleophilic substitution reactions:

(ii) Coupling reactions:

(iii) Formation of Methyl Orange: