An isocyanide on hydrolysis gives

Which of the following is most basic?

The increasing order of the $pK_b$ of the following compounds is:

How will you carry out the following conversion?
$Aniline \rightarrow m-Bromonitrobenzene$

Consider the following sequence of reactions. Total number of $sp^{3}$ hybridised carbon atoms in the major product $C$ formed is . . . . . . .

Given below are two statements:
Statement $I$: Primary aliphatic amines react with $HNO_2$ to give unstable diazonium salts.
Statement $II$: Primary aromatic amines react with $HNO_2$ to form diazonium salts which are stable even above $300 \ K$.
In the light of the above statements,choose the most appropriate answer from the options given below: