Question: Which of the following is a sidelink-specific service/function of the MAC sublayer in E-UTRA/E-UTRAN, distinct from its general services/functions?
Option 1: Radio resource selection
Option 2: Error correction through HARQ (Hybrid Automatic Repeat Request)
Option 3: Priority handling between logical channels of one UE (User Equipment)
Option 4: Transport format selection
Explanation: The correct answer is 'Radio resource selection' because it is a service/function tailored for sidelink communication, such as Vehicle-to-Everything (V2X) sidelink communication, distinct from general MAC services like error correction through HARQ, priority handling between logical channels of one UE, and transport format selection.