What is referential integrity?

  1. The relation of the primary key of a base table with foreign key of the reference table is known as referential integriety.

  2. The relation of the secondary key of a base table with foreign key of the reference table is known as referential integriety.

  3. The relation of the primary key of a secondary table with foreign key of the reference table is known as referential integriety.

  4. The relation of the primary key of a base table with index key of the reference table is known as referential integriety.


Correct Option: A

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