Given the following relation instance.
X Y Z
1 4 2
1 5 3
1 6 3
3 2 2
Which of the following functional dependencies are satisfied by the instance?
Option B is correct.
a functional dependency is said to hold if for two tuples t1 and t2 . If for t1[A] = t2[A] then t1[Y] = t2[Y].
Here we can manually check for each option with the given instance and option B satisfies