Question: Given the relation R ( A , B , C , D , E , F ) with the following set of functional dependencies: A

Given the relation R(A, B, C, D, E, F) with the following set of functional dependencies:
A -> B
BC -> D
E -> C
D -> A
Determine which of the following options IS NOT a candidate key for the relation R.
Group of answer choices
CEF
AEF
BEF
DEF

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