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If ___, then A -> B has non-trivial functional dependency
9. If ___, then A -> B has non-trivial functional dependency.
- B is not a subset of A
- A is not a subset of B
- A is not a subset of A'
- B is not a subset of B'
Answer: A) B is not a subset of A
Explanation:
If B is not a subset of A, then A -> B has non-trivial functional dependency.