Question: What triggers the release of PDCP, RLC entities, and the logical channel of a sidelink Signaling Radio Bearer (SRB) for a specific destination in a User Equipment (UE)?
Option 1: Successful establishment of a new PC5-RRC connection for a different destination.
Option 2: Detection of sidelink radio link failure or request from upper layers/AS layer to release a PC5-RRC connection for a specific destination.
Option 3: Completion of a discovery transmission for all destinations.
Option 4: Receipt of a handover command from the base station.
Explanation: The correct answer aligns with conditions for releasing resources associated with a sidelink SRB for a specific destination, including detection of sidelink radio link failure or receipt of a release request from upper layers/AS layer, highlighting resource management in response to connectivity issues or explicit release requests.