(Choose 1 answer)
Which of the following relations is in third normal form (3NF)?
A. R(A,B,C,D) with FD's: ACD -> B; AC -> D; D -> C; AC -> B
B. R(A,B,C,D) with FD's: AB -> C; ABD -> C; ABC -> D; AC -> D
C. R(A,B,C,D) with FD's: AB -> C; BCD -> A; D -> A; B -> C
Q: 31
