Which of the following is not a type of database model?OptionsRelational database modelNetwork database modelLinear database modelHierarchical database model

To determine which of the options is not a type of database model, we need to analyze each option one by one.

1. Relational database model: This is a well-known and widely used database model that organizes data into tables with rows and columns. It establishes relationships between tables using keys.

2. Network database model: This is also a valid type of database model. It organizes data using a network-like structure, where records can have multiple parent and child relationships.

3. Linear database model: This option is not a commonly recognized type of database model. It does not follow the traditional structure of organizing data into tables or using relationships.

4. Hierarchical database model: This is another valid type of database model. It organizes data in a tree-like structure, where each record has a single parent and multiple children.

Based on the analysis, the linear database model is not a type of database model.