## Answers

Candidate key uniquely identifies a row in a table. It can have one attribute or composite (multiple attributes).

**ANSWER - 6) None of the above**

AE - Row 2 and 5 have same values for A and E, they can't uniquely identify every row.

BC - Row 1 and 2 have same values.

BD - Row 1 and 2 have same values.

CD - Row 1 and 2 have same values, Row 3 and 4 have same values.

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