Which of the following are types of service defined in ITIL? 1. Core 2. Enabling 3. Special

Core (1) is a valid ITIL service type, but Special (3) is not - the three actual ITIL types are Core, Enabling, and Enhancing.

Special (3) is not defined as a service type anywhere in ITIL, making this answer incorrect regardless of the other selections.

ITIL service strategy defines Core services as those delivering the basic outcomes desired by the customer, and Enabling services as those required for a core service to be delivered (also referred to as supporting services). These two types, along with Enhancing services, form the complete ITIL taxonomy - 'Special' does not exist as a service type in any ITIL publication.

Enabling (2) is correct but Special (3) is not a recognized ITIL service type, and omitting Core (1) - the foundational service type in ITIL - makes this answer incorrect.