Look at the following statements:
(a)All relations in 3NF are also in 2NF(b)All relations in 2NF are also in 1NF
(c)All relations in 1NF are also in BCNF
(d)All relations in 1NF are also in 3NF
a. (b) and (d) are true
b. (a) and (c) are true
c. (a) and (d) are true
d. (a) and (b) are true
Answer: D