# Quiz
+ 2) Regarding TiDB Backoff , which statement below is wrong?
  + A. Common Backoff type are `pdRPC`, `regionMiss`, `serverBusy`, `tikvRPC`, `txnLock`, `txnLockFast`, `updateLeader` 
  + B. Through TiDB Dashboard -> KV Errors, you can see the recent Backoff Type and retry time
  + C. Record slow query Backoff Type and Retry time in TiDB Slow log
  + D. If the monitoring shows `Backoff` up, there may be a problem with the cluster

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Answer: D