The correct options are Graph database and Document database.

Graph database is non relational because it models data as nodes and relationships and it does not rely on fixed relational tables or normalized schemas. Graph stores are optimized for traversing relationships and they use graph oriented queries instead of the table joins typical of relational systems.

Document database is non relational because it stores semi structured documents such as JSON or BSON and it allows flexible, schema less records that do not map to normalized relational tables. Document stores support rich queries over documents but they are considered NoSQL rather than relational databases.

Contoso Database for MariaDB is incorrect because MariaDB is a relational database management system and solutions based on MariaDB use SQL tables and transactions. The product name indicates a relational engine rather than a NoSQL store.

SQL database is incorrect because SQL refers to relational database systems that use structured schemas and tables. The question asks which categories are not relational and SQL databases belong to the relational category.

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