Ethanamine $\underset{ \mathrm{Base} }{\stackrel{\mathrm{A}}{⟶}}\mathrm{N}$-Ethylbenzamide $\mathrm{A}$ is

In the reaction

Compound $\mathrm{A}$ and appropriate $\mathrm{pH}$ range, respectively, are

In the following reactions

$\mathrm{Acetanilide}\underset{{\mathrm{CH}}_3\mathrm{COOH}}{\overset{{\mathrm{Br}}_2}{\to }}\mathrm{C}\left(\mathrm{major}\right)\stackrel{{\mathrm{H}}^{+}}{\to }\mathrm{D}.$ $\mathrm{D}$ is

In the given set of reactions

 $\mathrm{D}$ is

Consider the following reaction

 Major product $\mathrm{B}$ is