Question: What is a prerequisite for a User Equipment (UE) to support Radio Resource Management (RRM) measurements on non-anchor paging carriers in FDD mode, specifically related to its category?
Option 1: The UE must support at least ue-Category-M
Option 2: The UE must be operating exclusively in TDD mode
Option 3: The UE's RRM measurement capability is independent of its ue-Category
Option 4: The UE must support any ue-Category-NB
Explanation: According to the specifications, for a UE to support RRM measurements on non-anchor paging carriers (a feature optional for FDD), it must also support NRS presence on those carriers. This capability is specifically tied to the UE supporting any ue-Category-NB, highlighting the importance of category in determining the UE's feature set for efficient radio resource management in certain operational modes.