Question: For a User Equipment (UE) to support physical layer Scheduling Request (SR) with Hybrid Automatic Repeat Request (HARQ) ACK in Frequency Division Duplexing (FDD), which of the following UE categories is applicable?
Option 1: UE Category-M
Option 2: Any UE Category-NB
Option 3: UE Category-1 only
Option 4: UE Categories above 6
Explanation: This is correct because support for SR with HARQ ACK in FDD is specifically applicable for UEs of any UE Category-NB, highlighting their importance in efficiently handling scheduling requests and acknowledgments within narrowband IoT contexts or similar resource-constrained scenarios.