Question: What is a prerequisite for a User Equipment (UE) to support tm9 operation in CE Mode A?
Option 1: The UE must support only Physical layer procedures.
Option 2: The UE must operate exclusively in FDD (Frequency Division Duplex) mode.
Option 3: The UE must also indicate support for ce-ModeA-r13.
Option 4: The UE needs to have a minimum of four antenna ports.
Explanation: For a User Equipment (UE) to support tm9 operation in CE Mode A, it is mandatory that the UE also indicates support for ce-ModeA-r13, ensuring alignment across protocol layers for seamless functionality and compatibility within the network.