For Nasdaq Basic, what's the mapping of topics to symbols?

Nasdaq Basic (QBBO) is delivered via three topics: 

  • QBBO-A-CORE NYSE-listed issues 
  • QBBO-B-CORE NYSE MKT-, NYSE Arca-, BATS-, and U.S. regional stock exchange- listed issues 
  • QBBO-C-CORE Nasdaq-listed issues.
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