Question: Which of the following substates of state 5GMM-REGISTERED are not applicable to non-3GPP access?
Option 1: 5GMM-REGISTERED.PLMN-SEARCH and 5GMM-REGISTERED.NON-ALLOWED-SERVICE
Option 2: 5GMM-REGISTERED.NO-CELL-AVAILABLE only
Option 3: 5GMM-REGISTERED.PLMN-SEARCH, 5GMM-REGISTERED.NON-ALLOWED-SERVICE, and 5GMM-REGISTERED.NO-CELL-AVAILABLE
Option 4: None of the above
Explanation: According to the NAS protocol for 5G System (5GS), the substates 5GMM-REGISTERED.PLMN-SEARCH, 5GMM-REGISTERED.NON-ALLOWED-SERVICE, and 5GMM-REGISTERED.NO-CELL-AVAILABLE are not applicable to non-3GPP access. These substates are specific to 3GPP access and do not apply to non-3GPP access scenarios.