Question: In an Isolated Operation for Public Safety (IOPS) mode, what can a discovered Mission Critical (MC) user subscribe to regarding other MC users on the IOPS MC connectivity function?
Option 1: Only to receive direct messages from all other MC users.
Option 2: To be notified about the connectivity information of specific MC users outside their IOPS group.
Option 3: To initiate voice calls with any discovered MC user without prior subscription.
Option 4: To be notified about the connectivity information of other discovered MC users within their associated IOPS groups, and/or the number of such users.
Explanation: This option correctly reflects the capabilities provided by the IOPS subscription and notification procedures for IP connectivity functionality. It aligns with the described functionality where a discovered MC user can subscribe to receive updates on the connectivity status of other MC users within their associated groups, as well as the count of such connected users, enhancing coordination and situational awareness in public safety scenarios.