Question: In the context of UTRAN Iu interface RANAP signalling, what does the Delta RA List for Idle Mode UEs primarily indicate regarding a given Multicast Service?
Option 1: The total number of idle-mode UEs subscribed to the service across all Radio Access Networks (RANs).
Option 2: The list of new RAs with interested idle-mode UEs and RAs with no longer interested idle-mode UEs for the service.
Option 3: The geographical distribution of active-mode UEs currently consuming the multicast content.
Option 4: The signal strength thresholds for handovers between different Radio Access Networks (RANs) for the service.
Explanation: This option is correct because it accurately reflects the information conveyed by the Delta RA List for Idle Mode UEs in relation to a given Multicast Service, highlighting new RAs with interested idle-mode UEs and RAs with no longer interested idle-mode UEs, crucial for efficient management of multicast services across the network.