Which of the following is NOT a type of modern database management system?

C is the correct answer because a Linear DBMS is not recognized as a standard type of modern database management system. In the realm of database management, the common types are relational, hierarchical, and network database management systems.

Relational DBMS, which organizes data into tables, is widely used in applications due to its flexibility and ease of use, allowing for complex queries and data relationships. Hierarchical DBMS arranges data in a tree structure, where each record has a single parent, facilitating a one-to-many relationship. Network DBMS allows for more complex relationships by utilizing a graph structure, enabling more than one parent for a single record, which is beneficial in certain applications.

In contrast, the Linear DBMS does not exist as a recognized category in modern database management practices. While the term could suggest a database structure that processes data in a linear fashion, this is not an established or distinct methodology like the others. Thus, identifying it as a type of modern DBMS is inaccurate.