Consider a relation R with five attributes V, W, X, Y, and Z. The following…

2006

Consider a relation R with five attributes V, W, X, Y, and Z. The following functional dependencies hold:

VY→ W, WX → Z, and ZY → V.

Which of the following is a candidate key for R?

  1. A.

    VXZ

  2. B.

    VXY

  3. C.

    VWXY

  4. D.

    VWXYZ

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