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

$CH_3-CH_2-I$ $\xrightarrow{NaCN} A$ $\xrightarrow[Partial \ hydrolysis]{\Theta OH} B$ $\xrightarrow[Br_2]{NaOH} C$. Product $C$ is

The conversion of propan$-1-$ol to $n-$butylamine involves the sequential addition of reagents. The correct sequential order of reagents is:

Which of the following gives a primary amine on reduction?

Which of the following reagents is used to convert a $-CN$ group to a $-CH_2NH_2$ group?

$CH_3CONH_2$ $\xrightarrow{PCl_5} A$ $\xrightarrow{Na/EtOH} B$. What is reaction $II$ called?