Hordei viruses are

Answer: Option C

Hordeiviruses are Tripartite.
Tripartite is divided into or composed of three parts.
Hordeivirus is a genus of viruses, in the family Virgaviridae. Plants serve as natural hosts. There are four species in this genus.
Viruses in the genus Hordeivirus are non-enveloped, with rod-shaped geometries. The diameter is around 20 - 25 nm, with a length of 20 - 25 nm. Genomes are linear and segmented, tripartite or quadripartite, around 3.3 kb in length.