Which of the following service desk organizational structures are described in service operation? 1. Local service desk 2. Virtual service desk 3. IT help desk 4. Follow the sun

ITIL Service Operation describes the local service desk (physically co-located with users), the virtual service desk (geographically dispersed but appearing as one unit via technology), and follow the sun (desks in different time zones providing 24-hour coverage by handing off incidents). These are the three recognized structures; 'IT help desk' is not a defined structure in ITIL Service Operation.

This option includes option 3 (IT help desk), which is not a defined service desk organizational structure in ITIL Service Operation, making the combination incorrect.

This option includes option 3 (IT help desk) and excludes option 2 (virtual service desk), which is a documented ITIL Service Operation structure, making the combination incorrect.

This option includes option 3 (IT help desk) and excludes option 4 (follow the sun), which is a documented ITIL Service Operation structure, making the combination incorrect.