Question: Under what condition is an additional Sidelink RLC (Radio Link Control) Bearer released for a sidelink DRB (Data Radio Bearer) in NR (New Radio) sidelink communication, specifically related to the SL-TxProfile of associated QoS (Quality of Service) flow(s)?
Option 1: If the SL-RLC-BearerConfigIndex is included in sl-RLC-BearerToReleaseList in RRCReconfigurationSidelink.
Option 2: If the SL-TxProfile indicates forwardsCompatible and UE decides to use PDCP duplication.
Option 3: If the sidelink DRB's release conditions are met for the associated sidelink DRB.
Option 4: If SL-RLC-BearerConfig is received for a sl-ServedRadioBearer with an SL-TxProfile indicating backwardsCompatible and the UE decides not to use PDCP duplication.
Explanation: This option correctly identifies a specific condition under which an additional Sidelink RLC Bearer is released for a sidelink DRB, involving receipt of SL-RLC-BearerConfig with an SL-TxProfile set to backwardsCompatible and the UE's decision against using PDCP duplication, aligning with 3GPP specifications for RRC protocol.