Question: Under which condition can the Service Abort Procedure be invoked by the VLR for a mobile terminating CS fallback call during its establishment?
Option 1: For UEs attached for EPS services exclusively
Option 2: For UEs attached for non-EPS services only
Option 3: For UEs attached for both EPS and SMS services
Option 4: For UEs simultaneously attached for both EPS services and non-EPS services
Explanation: The Service Abort Procedure applies to UEs with simultaneous attachments for Evolved Packet System (EPS) services and non-EPS services, crucial for aborting a mobile terminating CS fallback call during setup, highlighting the interface's handling of mixed service types.