Which among the following are unsaturated hydrocarbons?

In these options, carbon atoms show double bond and triple bonds; hence these are unsaturated hydrocarbons.

Unsaturated hydrocarbons are hydrocarbons that form double or triple covalent bonds with other carbon atoms. Those hydrocarbons that have at least one carbon-to-carbon double bond are called alkenes. Those hydrocarbons with at least one carbon-to-carbon triple bond are called alkynes.