Using $\mathrm{Fe}/\mathrm{HCl}$, which one of the following reaction is possible [Here $\varphi ={\mathrm{C}}_6{\mathrm{H}}_5$]

The correct order of decreasing basic strength is:

Assertion (A): Acetamide one reaction with ${\mathrm{Br}}_2/\mathrm{NaOH}$ give ${\mathrm{CH}}_3-{\mathrm{NH}}_2$.

Reason (R): Carbon of amide functional group becomes part of ${\mathrm{Na}}_2{\mathrm{CO}}_3$.

Assertion (A): Diazonium salt is prepared at low temperature.

Reason (R): Diazonium salt is hydrolysed to give phenol.

Assertion (A): Carbylamine reaction involves reaction between $1°$ amine and chloroform in basic medium to give isocyanide.

Reason (R): Methylene $\left(:{\mathrm{CH}}_2\right)$ carbene is formed as a reaction intermediate.

Assertion (A): Suitable method for preparation of primary amine is when haloalkane is treated with excess of ${\mathrm{NH}}_3$.

Reason (R): In this reaction primary, secondary, tertiary amines are formed.