Question: int R 1 ( A , B , C ) and R 2 ( B , C , D ) is dependency preserving?Does BCNF guaranty

intR1(A,B,C) and R2(B,C,D) is dependency preserving?Does BCNF guaranty zero redundancy?
int R 1 ( A , B , C ) and R 2 ( B , C , D ) is

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