Question: Upon receiving a ProSe Direct Discovery Authorization Update request, what action does the ProSe Function take if the Banned PDUID belongs to its own PLMN but the requesting RPAUID is not allowed to discover the Banned RPAUID?
Option 1: Set the result code to 'DIAMETER_SUCCESS' in the response.
Option 2: Set the experimental result code to 'DIAMETER_ERROR_INVALID_TARGET_RPAUID' in the response.
Option 3: Set the Result Code to 'DIAMETER_UNABLE_TO_COMPLY' due to authorization failure.
Option 4: Ignore the request and do not send a response.
Explanation: If the Banned PDUID belongs to its own PLMN but the requesting RPAUID is not authorized to discover the Banned RPAUID, the ProSe Function sets the experimental result code to 'DIAMETER_ERROR_INVALID_TARGET_RPAUID', indicating an issue with the target RPAUID's validity for the requested action.