Consider the schema R = (S T U V) and the dependencies S → T, T → U, U → V and V → S. Let R = (R1 and R2). be a decomposition such that R1 ∩ R2 = ϕ The decomposition is
1
not in 2 NF
2
in 2 NF but not in 3 NF
3
in 3 NF but not in 2 NF
4
in both 2 NF and 3 NF