A select list (single choice) field meets the requirements because it allows different options in different projects, allows options to be disabled where necessary, allows only a single value, and allows a default value to be configured. A select list (single choice) field is a custom field that lets the user select one option from a list of predefined values. The values can be different for each project and can be enabled or disabled as needed.  The field can also have a default value that is automatically selected when creating an issue 1 2   References:

1 : What are custom fields? | Jira Software Cloud | Atlassian Support

2 : Configuring a custom field | Jira Software Cloud | Atlassian Support

Anu needs to be added to a project role that has Manage Sprints permission. This permission allows Anu to plan, start, and complete sprints, as well as edit sprint goals and dates on a Scrum board. The other options are not correct for Anu’s needs. The group that has Schedule Issues permission does not allow Anu to manage sprints, but only to rank issues on a Scrum board. The list of board administrators for the Scrum board does not grant Anu any permissions, but only allows Anu to configure the board settings. A project role that has Start/Complete Sprints permission does not allow Anu to edit sprint goals and dates, but only to start and complete sprints on a Scrum board. A project role that has Administer Projects permission does not allow Anu to manage sprints, but only to administer the project settings. For more information on how to manage sprints on a Scrum board, see  Manage sprints  and  Manage project permissions .  References:   Manage sprints ,  Manage project permissions