Answer:
(b) BC → A
Explanation:
For given instance of S, certain dependencies (that is to say, A → B and B → C) can be said that they are not violated by this instance of S.
It can be said that an FD holds with respect to a relationship is to make a claim about all appropriate instances of S.
BC → A does not hold over S. To confirm, let's look at the tuples (1, 2, 3) and (4, 2, 3).
Hence, the answer is (b) BC → A.
