The correct option is D Ginkgo
A living fossil is a living organism that belongs to an otherwise extinct group. It is the only living species from its respective taxonomic group (all other species of that group are extinct). Evidences have revealed that Ginkgo biloba is a "living fossil" because it has no close living relatives, and appears to be much similar to a plant species dating back to as early as the Mesozoic era in the fossil record.