Question: What is a prerequisite for a User Equipment (UE) to support NPBCH-Based RRM measurements for its serving cell in FDD mode?
Option 1: The UE must be operating in TDD mode exclusively.
Option 2: The UE needs to have a minimum of two transmitting antennas.
Option 3: The UE has to support any ue-Category-M (Machine Type Communications) or above.
Option 4: The UE must support any ue-Category-NB (NarrowBand IoT).
Explanation: Supporting any ue-Category-NB is a prerequisite, as NPBCH-Based RRM measurements for the serving cell in FDD mode are specifically relevant for NarrowBand IoT (NB-IoT) use cases, highlighting category support's importance in determining UE capabilities.