Question: What are the possible roles of a UE (User Equipment) categorized as UE 1 in a Mission Critical (MC) service scenario over a 5G System (5GS)?
Option 1: A UE only supporting voice connectivity for MC services.
Option 2: A UE exclusively acting as a 5G ProSe (Proximity Services) UE-to-UE relay.
Option 3: A UE that supports either data connectivity for MC services or acts as a 5G ProSe UE-to-network relay, but not both.
Option 4: A UE that can support data connectivity and application(s) related to one or more MC services over the 5GS, and/or act as a 5G ProSe UE-to-network relay.
Explanation: This is correct because, according to the specifications for UE 1 in Mission Critical services over 5G System, it encompasses UEs that support data connectivity for MC services (including related applications) and/or those that function as a 5G ProSe UE-to-network relay. This dual capability aligns with enhancing reliability and coverage for critical communications. Options 1 through 3 are incorrect because they either limit the functionality to less than what's specified (e.g., only voice, only UE-to-UE relay, or an exclusive OR scenario) or misrepresent the roles defined for a UE 1.