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For a relation R with schema R ( A , B , C , D ) , let us assume that A is the primary

For a relation R with schema R (A, B, C, D), let us assume that A is the primary key. And, R consists of the set of functional dependencies F {A -> B, A -> C, AB -> C, C -> D}. Which of the following would violate the 3NF rule?
AB -> C
C -> D
A -> BCD
{A}

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