Which of the following statement is correct, according to the following instance of the relational schema R(X, Y, Z)?
| X | Y | Z |
| 1 | 1 | a |
| 1 | 1 | a |
| 2 | 1 | b |
| 3 | 2 | b |
1
X →Y, Z → X
2
Y → Z, Z → X
3
X → Y, X → Z
4
Y → X, X → Z
Which of the following statement is correct, according to the following instance of the relational schema R(X, Y, Z)?
| X | Y | Z |
| 1 | 1 | a |
| 1 | 1 | a |
| 2 | 1 | b |
| 3 | 2 | b |