Question: For a User Equipment (UE) to support 16QAM for Downlink (DL) unicast in an E-UTRA network, which of the following UE categories must it at least support?
Option 1: Category M1
Option 2: Category NB2
Option 3: Category 1
Option 4: Category 4
Explanation: The correct answer is Option 2 because support for 16QAM in DL unicast is conditional on the UE supporting at least category NB2, highlighting the interplay between modulation schemes and device capabilities in E-UTRA networks.