Which of the following functional groups contains a carbonyl group directly bonded to a nitrogen atom?

Recall that an amide is a functional group where a carbonyl group is directly bonded to a nitrogen atom. The general structure of an amide is $RC=ONH\mathrm{R\text{'}}$, where $R$ and $\mathrm{R\text{'}}$ are organic groups.

Compare the structures of the other functional groups: Aldehyde has a carbonyl group bonded to a hydrogen and an R group, Ether has an oxygen atom bonded to two R groups, and Alcohol has an OH group bonded to an R group.