Under O.C.G.A., what is the relationship requirement for incest to be prosecuted?

The correct answer identifies that the relationship requirement for incest to be prosecuted includes both blood and marriage relations. Under the Official Code of Georgia Annotated (O.C.G.A.), incest laws cover a wider range of relationships than just those who are directly related by blood. This means that not only biological relationships (such as parent-child or sibling) qualify, but also legal relationships that arise from marriage (such as in-laws).

By including both blood and marriage relations, the statute aims to prohibit sexual relations within a broad array of familial connections, thus addressing both physical (biologically related) and social (through marriage) forms of family ties. This comprehensive approach reflects the state's interest in promoting family integrity and avoiding potential issues related to genetic disorders or social instability that may arise from such relationships.

The other options do not capture the full range of relationships that the law intends to cover, emphasizing the importance of both blood and marriage in the legal definition of incest within Georgia law.