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Working with Tables — Computer STD 11 Arts — Question

Gujarat BoardEnglish MediumSTD 11 ArtsComputerWorking with Tables1 Mark
MCQ
The field which contains a primary key whose values is not $………………$
  • A
    duplicate
  • B
    empty
  • ✓
    both $(A)$ and $(B)$
  • D
    none of these
✓

Answer

Correct option: C.
both $(A)$ and $(B)$

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