Which of the following is the most basic in an aqueous solution?

Identify $X$ and $Y$ in the following reactions:

Given below are two statements:
Statement $I$ : The $NH_2$ group in Aniline is ortho and para directing and a powerful activating group.
Statement $II$ : Aniline does not undergo Friedel-Craft's reaction (alkylation and acylation).
In the light of the above statements,choose the most appropriate answer from the options given below :

In the $Hofmann$ bromamide degradation reaction,the number of moles of $NaOH$ and $Br_2$ used per mole of amine produced are:

Which of the following compounds gives the smell of mustard oil?