For a relation R(A, B, C, D, E) with the set of functional dependencies F = {A → B, CD → E, B → D, E → A}, which of the following are the candidate keys (minimal keys) of R?
A. AB, CD
B. AC, BC, CD, CE
C. AC, BC, AEC
D. A, D, DE
Answer:B
For a relation R(A, B, C, D, E) with the set of functional dependencies F = {A → B, CD → E, B → D, E → A}, which of the following are the candidate keys (minimal keys) of R?
A. AB, CD B. AC, BC, CD, CE C. AC, BC, AEC D. A, D, DE