Question: In a Cell Broadcast Service (CBS) scenario, which of the following Information Elements (IEs) are likely to be present in a WRITE-REPLACE-WARNING-CONFIRM Response/Confirm primitive received from an AMF via a PWS-IWF?
Option 1: Cause E-UTRAN IE and Unknown Tracking Area IE
Option 2: Cause NG-RAN IE only
Option 3: Cause NG-RAN IE and Unknown NG-RAN Tracking Area List
Option 4: No IEs are present in this scenario
Explanation: When the WRITE-REPLACE-WARNING-CONFIRM Response/Confirm primitive is sent via an Access and Mobility Management Function (AMF) through a Public Warning System - Interface to the Wireless Framework (PWS-IWF), it typically includes specific information related to the Next Generation Radio Access Network (NG-RAN). The presence of both the Cause NG-RAN IE, which indicates the reason for the response, and the Unknown NG-RAN Tracking Area List, which provides location-specific details, is consistent with the protocol's design for acknowledging warning message requests in a 5G or evolved network context.