Which of the following is a property of alkane compounds?

Alkane compounds are classified as saturated hydrocarbons. This means that they contain only single bonds between carbon atoms, allowing them to be fully saturated with hydrogen atoms. The general formula for alkanes is CnH₂n+2, where 'n' represents the number of carbon atoms. This structure ensures that each carbon atom is bonded to the maximum number of hydrogen atoms possible, which is a defining characteristic of saturated hydrocarbons.

Other options describe different types of organic compounds. Unsaturated hydrocarbons, such as alkenes and alkynes, contain double or triple bonds respectively and are not alkanes. Compounds containing benzene rings, such as aromatic hydrocarbons, differ significantly in structure and properties from alkanes. The mention of multiple functional groups pertains to compounds that contain various functional groups beyond just hydrocarbons, which again is not a characteristic of alkanes. Therefore, the classification of alkanes as saturated hydrocarbons is the correct choice.