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

a) A->B, B->CD
b) A->B, B->C, C->D
c) AB->C, C->AD
d) A->BCD

Answer: d
Explanation: This relation gives a relation without any loss in the values.

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