Which of the following cannot be used for $—{\mathrm{CONH}}_2$?

The correct IUPAC name of the above compound is:

In the above compound, the functional groups present are:

Number of functional groups present in the above compound is (include repetition of the same functional group too):

Match the compounds in column-I with IUPAC name in column-II.

Column-I	Column-II
(a) $\mathrm{OHC}-\mathrm{COOH}$	(p) $1-$Aminomethanamide
(b)	(q) Formyl methanoic acid
(c) ${\mathrm{NH}}_2{\mathrm{CONH}}_2$	(r) $4-$Hydroxy$-4-$methylpentan$-2-$one

The $\mathrm{IUPAC}$ name of the above compound is