Question: For a User Equipment (UE) operating in Frequency Division Duplexing (FDD) mode, what is the condition for supporting Downlink (DL) channel quality reporting in Msg3 for the anchor carrier?
Option 1: The UE must support any ue-Category-NB and the feature is optional.
Option 2: The feature is only applicable if the UE operates exclusively in Time Division Duplexing (TDD) mode.
Option 3: The UE must support any ue-Category-NB and the feature is mandatory for FDD.
Option 4: The feature is supported by all UE categories without any specific category requirement.
Explanation: This is correct because, as per the context, supporting DL channel quality reporting in Msg3 for the anchor carrier in FDD mode is indeed optional for the UE, with the added condition that the UE must support any ue-Category-NB.