Question: Under what condition shall the UE not request a PDU session establishment for an LADN?
Option 1: If the DNN used for that LADN is included in the Extended LADN information IE and there is no S-NSSAI used for PDU session establishment.
Option 2: If the UE is located within the LADN service area indicated in the LADN information IE.
Option 3: If the DNN used for that LADN is included in the Extended LADN information IE and the S-NSSAI used for PDU session establishment is not associated with that LADN.
Option 4: If the UE has indicated preference for control plane CIoT 5GS optimization.
Explanation: According to the text, one of the conditions under which the UE shall not request a PDU session establishment for an LADN is if the DNN used for that LADN is included in the Extended LADN information IE and the S-NSSAI used for PDU session establishment is not associated with that LADN.