Question: For a User Equipment (UE) to support npdsch-MultiTB-Interleaving-r16 for NB-IoT FDD, which of the following additional capabilities must the UE also indicate support for?
Option 1: twoHARQ-Processes-r14 and Category M1
Option 2: twoHARQ-Processes-r14 (with the UE supporting at least Category NB2)
Option 3: Enhanced Interleaving for LTE-M
Option 4: Single Carrier Aggregation for FDD
Explanation: According to the specifications, a UE indicating support of npdsch-MultiTB-Interleaving-r16 must also indicate support of twoHARQ-Processes-r14. Additionally, this feature is specifically applicable if the UE supports Category NB2. Therefore, the correct answer combines these two requirements accurately.