What is the number of primary amines possible for the compound having molecular formula $C_4H_{11}N$?

When alkyl halide is boiled with a large excess of alcoholic ammonia,it forms:

Acetamide is treated with the following reagents separately. Which one of these would yield methylamine?

Number of isomeric aromatic amines with molecular formula $C_8H_{11}N$,which can be synthesized by Gabriel Phthalimide synthesis is $.........$.

Identify the Gabriel phthalimide synthesis reaction from the reactants and reagents used in it.

Select the reagents that reduce nitriles to primary amines:
$A$. $(i) \text{LiAlH}_4$; $(ii) \text{H}_2\text{O}$
$B$. $\text{Sn} + \text{HCl}$
$C$. $\text{H}_2/\text{Ni}$
$D$. $\text{Na(Hg)}/\text{C}_2\text{H}_5\text{OH}$
$E$. $\text{Br}_2/\text{aq. NaOH}$
Choose the correct answer from the options given below: