Question: What is the minimum Forward Error Correction (FEC) scheme support requirement for a User Equipment (UE) that supports Multimedia Broadcast/Multicast Service (MBMS) User Services?
Option 1: Only Raptor FEC scheme
Option 2: Only Compact No-Code FEC scheme (Null-FEC)
Option 3: Both Compact No-Code FEC scheme (Null-FEC) and Raptor FEC scheme
Option 4: Either Compact No-Code FEC scheme (Null-FEC) or Raptor FEC scheme, at the UE's discretion
Explanation: According to specifications for MBMS User Services, a UE must support both the basic level of error correction (Compact No-Code FEC scheme/Null-FEC) and the advanced Raptor FEC scheme for comprehensive service compatibility, ensuring effective handling of various transmission scenarios and source block recovery when sufficient encoding symbols are received.