Which statement about organism classified in the same genus is true?

The correct answer is - They must be in the same phylum but may be a different species.

Explanation:

Genus is a taxanomic category in a biological classification that is more inclusive than phylum and class and ranks above the species. It includes the group of organism that are under in same family, class, or phylum in more general but these organism may belong to different species.

Thus, the correct answer is - They must be in the same phylum but may be a different species.

Genus represents taxonomic rank above species and below family. When organisms belong to the same genus, they must be of the same phyla, but may be in different species. In binomial nomenclature it is the generic name shared by the group of close relative.