Question: Which of the following services is supported for continuity between NG-RAN and UTRAN in the 5G system?
Option 1: Video service
Option 2: Voice service with seamless handover
Option 3: Voice service
Option 4: IP address preservation for PS service
Explanation: According to the service requirements, voice service continuity from NG-RAN to UTRAN CS should be supported in the 5G system. This means that users can expect uninterrupted voice services when moving between these networks.