Which of the following amines cannot be prepared by the Gabriel phthalimide synthesis method?

The product $(C)$ will be

What will be the product $A$ in the reaction given below?

Identify the reactions which give aniline as the major product.
Choose the correct answer from the options given below.
$A$. $\text{Benzonitrile} \xrightarrow{LiAlH_4} \text{Benzylamine}$
$B$. $\text{Benzamide} \xrightarrow{KOH, Br_2} \text{Aniline}$
$C$. $\text{Nitrobenzene} \xrightarrow{NaBH_4} \text{No reaction}$
$D$. $\text{Acetanilide} \xrightarrow{HCl, H_2O, \Delta} \text{Aniline}$

Why cannot aromatic primary amines be prepared by Gabriel phthalimide synthesis?

Explain Gabriel phthalimide synthesis.