Relation R is decomposed using a set of functional dependency F, and relation S is decomposed using another set of functional dependencies G. One decomposition is definitely BCNF, the other is definitely 3NF, but is not known to make a guaranteed identification. Which of the following tests should be used for the decomposition? (Assume that closure of F and G are available)
A. Dependency preservation
B. BCNF definition
C. Both (A) and (B)
D. 3NF definition
I think D should be most appropriate answer but answer key has given it B.