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      Question

      Which of these ensures referential

      integrity?
      A Primary key Correct Answer Incorrect Answer
      B Candidate key Correct Answer Incorrect Answer
      C Foreign key Correct Answer Incorrect Answer
      D Composite key Correct Answer Incorrect Answer
      E Unique key Correct Answer Incorrect Answer

      Solution

      Foreign key links one tableтАЩs field to anotherтАЩs primary key.

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