Question: What is the primary purpose of the Emergency APN (Em-APN) in a Public Land Mobile Network (PLMN)?
Option 1: To provide general internet access to User Equipment (UE) for non-emergency services.
Option 2: To facilitate roaming between different PLMNs for emergency calls.
Option 3: To derive a PDN Gateway (PDN GW) selected for IMS Emergency call support within a given PLMN.
Option 4: To manage Quality of Service (QoS) for all types of data sessions in a PLMN.
Explanation: The Emergency APN (Em-APN) is specifically defined to identify and derive a suitable PDN Gateway that supports IMS emergency calls, ensuring efficient routing and management of emergency communications within a PLMN.