Which of the following compounds will not give isocyanide on reaction with $CHCl_3 + KOH$?

$R-CONH_2 \xrightarrow[{(2)H_3O^{+}}]{{(1)LiAlH_4}} P$ (Major),$P$ should be:

The product $(C)$ in the above reaction is:

$A$ student performed an analysis of an aliphatic organic compound '$X$' which, upon analysis, gave $C=61.01\%$, $H=15.25\%$, $N=23.74\%$. This compound, on treatment with $HNO_2/H_2O$, produced another compound '$Y$' which did not contain any nitrogen atom. However, the compound '$Y$' upon controlled oxidation produced another compound '$Z$' that responded to the iodoform test. The structure of '$X$' is:

Among the following,which one does not act as an intermediate in the Hofmann rearrangement?

Which of the following reactions does $NOT$ involve the replacement of the diazonium group?