Aniline under acidic medium,when chlorinated,produces :

In the following compounds,the order of basicity is as follows:

Arrange the following compounds according to increasing order of boiling points: $n-C_4H_9OH$ $(A)$, $n-C_4H_9NH_2$ $(B)$, $n-C_4H_{10}$ $(C)$, and $C_2H_5NHC_2H_5$ $(D)$.

What are $X$ and $Y$ in the following reactions?

The product $(A)$ is:

The product of the above reaction is: