Question: What happens when the timer corresponding to the Active Time value expires in a UE that has negotiated MICO mode with an AMF?
Option 1: The UE enters CM-CONNECTED state.
Option 2: The UE sends a periodic registration update to the AMF.
Option 3: The UE and AMF reset the timer.
Option 4: The UE enters MICO mode and is not available for paging.
Explanation: When the timer corresponding to the Active Time value expires, the UE enters MICO mode, indicating that it is no longer reachable for paging. This allows the AMF to deduce that the UE has entered MICO mode and is not available for paging, which helps in optimizing network resources.