Question: In which state does the AMF consider a UE to be reachable by CN paging, assuming the UE is not in MICO mode and has not indicated an Unavailability Period Duration?
Option 1: RM-DEREGISTERED
Option 2: CM-CONNECTED
Option 3: RM-REGISTERED with CM-IDLE state
Option 4: RM-REGISTERED with CM-CONNECTED state
Explanation: According to the 3GPP specification, when a UE is in RM-REGISTERED state and its CM state in the AMF is CM-IDLE, it is considered reachable by CN paging. This allows mobile terminated data to be delivered while the UE is in CM-IDLE state.