For any relation R, if, for every valid instance of A, that value of A uniquely determines the value of B:
A) then a primary dependency exists in the relation.
B) then A is said to be functionally dependent on B.
C) then B is said to be functionally dependent on A.
D) then A and B are candidate keys for the relation.
E) None of the above is true.

Question

Quizplus · Accepted Answer

This is the definition of functional dependency, where the value of B is uniquely determined by the value of A. Therefore, B is functionally dependent on A.

For Any Relation R, If, for Every Valid Instance of A