# Quiz

+ What are the following descriptions of PD architecture and features correct?
  + `A` . TSO can be obtained by visiting any node in the PD cluster
  + `B` . TiKV will report status to PD periodically
  + `C` . PD periodically queries the status of TiKV and does not need to report TiKV, in order to be efficient
  + `D` . The scheduling function of PD can only balance the distribution of regions, and cannot schedule the leader

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B