Q2.23

MCQ2 marks, −0.5

$R(A,B,C,D)$ is a relation. Which of the following does not have a lossless join, dependency preserving $BCNF$ decomposition?

(A)

$A \rightarrow B, B \rightarrow CD$

(B)

$A \rightarrow B, B \rightarrow C, C \rightarrow D$

(C)

$AB \rightarrow C, C \rightarrow AD$

(D)

$A \rightarrow BCD$

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