Radio Button
A radio button field allows users to select a single option from a predefined set of choices.
Each selection returns an identifier that corresponds either to a list option or a content item, depending on the configuration.
Examples
List-Based Selection

In this example, selecting Yes returns the identifier of the selected list
option (e.g., 12).
Content-Based Selection

In this example, selecting Core Admin returns the identifier of the associated
content item (e.g., a user ID such as 1).
Notes
- Only one option can be selected at a time.
- The returned value is always an ID, not the display label.
- The type of ID returned depends on whether the field is linked to a list or a content type.