Consider a schema R(P, Q, R, S) and the functional dependencies P → Q, Q → R, R → S, S → Q. Then the decomposition of R into R₁(P, Q), R₂(Q, R) and R₃(Q, S) is:

1. ADependency preserving and lossless join
2. BLossless join but not dependency preserving
3. CDependency preserving but not lossless join
4. DNot dependency preserving and not lossless join

Pick an option to check yourself, or open the answer below.