Which of the following compounds acts as the strongest base in its aqueous solution?

The major product of the following reaction is:

$CH_3CH_2I$ $\xrightarrow{NaCN} A$ $\xrightarrow{OH^- \text{ (partial hydrolysis)}} B$ $\xrightarrow{Br_2/NaOH} C$. Identify the final product $C$.

The correct order of increasing basic nature for the bases $NH_{3}$,$CH_{3}NH_{2}$ and $(CH_{3})_{2}NH$ in aqueous solutions is:

What is the correct order of basicity for the given amines in a chlorobenzene medium?
$(A)$ $CH_3CH_2NH_2$
$(B)$ Cyclohexylamine
$(C)$ $N$-Methylpiperidine
$(D)$ Pyrrolidine

In the below given synthetic sequence,the product "$C$" is