4. In a relational database, entities are defined by O A. values.
O B. columns.
O C. attributes.
O D. rows.

C. attributes

Explanation:

A relational database is a database system that stores information within its servers. It has rows and columns that contain the data stored in them and which can be accessed at any time with the right administrative privileges.

In a relational database, entities are defined by their attributes. This is because an entity is the data that needs to be stored so, the attribute specifies that information and gives its value.

answer; ///400 ibs;