The InnoDB engine has a feature known as clustered indexes. Which three statements are true about clustered indexes as used in InnoDB?

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• AA primary key must exist for creation of a clustered index.
• BA primary key is used as a clustered index.
• CA clustered index is a grouping of indexes from different tables into a global index for faster searching.
• DIf no indexes exist, a hidden clustered index is generated based on row IDs.
• EA clustered index provides direct access to a page containing row data.
• FThe first unique index is always used as a clustered index and not a primary key.
• GA clustered index allows fulltext searching within InnoDB,

• A
  3% (1)
• B
  76% (25)
• C
  6% (2)
• F
  3% (1)
• G
  12% (4)

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