A compound having straight chain of five carbon atoms has one ketone group and two methyl group on different-defferent carbon atoms. The `IUPAC` name of the compound is:

A compound having straight chain of five carbon atoms, it has one ketone group and two methyl group on different-different carbon atoms. The IUPAC name of the compound is :

The carbon atom of the carbonyl group is :

The carbon atom of the carbonyl group is :

The carbon atom of carboxylic group is