Question: Here is an instance of a relation R(A,B,C,D): A B C D 1 2 3 7 1 2 3 8 4 2 5 7 4
Here is an instance of a relation R(A,B,C,D):
| A | B | C | D |
|---|---|---|---|
| 1 | 2 | 3 | 7 |
| 1 | 2 | 3 | 8 |
| 4 | 2 | 5 | 7 |
| 4 | 2 | 5 | 8 |
Consider the following three multivalued dependencies:
(1) AB C, (2) CD A, (3) D C
The following (M,n) pairs say that to satisfy multivalued dependency M (M=1, M=2, or M=3), a minimum of n tuples must be added to the given instance of R. Only one such pair is correct; which one?
(1,2)
(3,4)
(3,0)
(3,2)
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