Question: What is the value of rlf-Cause in the VarRLF-Report when the UE declares radio link failure due to consistent uplink LBT failures?
Option 1: lbtFailure
Option 2: randomAccessProblem
Option 3: beamFailureRecoveryFailure
Option 4: t310-Expiry
Explanation: According to the RRC protocol specification, when the UE declares radio link failure due to consistent uplink LBT failures, it sets the rlf-Cause in the VarRLF-Report as lbtFailure. This is a specific cause value that indicates the reason for the radio link failure, which in this case is related to uplink LBT (Listen Before Talk) failures.