Which of the following is the correct way to refer to a field in a GlideRecord query?

After executing a query and retrieving a record using a GlideRecord object (e.g., `record`), its fields can be accessed directly using dot-walking notation (e.g., `record.field_name`).

"field.<field_name>" is not the correct syntax for accessing a field on a GlideRecord object; `field` is not a standard GlideRecord instance name.

While `gr.<field_name>` is a syntactically correct way to access a field if `gr` is the GlideRecord variable, `record.<field_name>` is also correct and often used as a general placeholder in documentation examples, making it the intended correct answer here.

`gr.get('<field_name>')` is a method that typically returns the display value or value of a specific field identified by a string, but the most direct and common way to access a field's value is using dot-walking directly, as in `record.field_name`.