Let R = (A, B, C, D, E, F) be a relation scheme with the following functional…

GATE · 1999 · CS · Question 1 subparts

Let R = (A, B, C, D, E, F) be a relation scheme with the following functional dependencies:

C -> F, E -> A, EC -> D, A -> B

Which of the following is a key of R?

  1. A.

    CD

  2. B.

    EC

  3. C.

    AE

  4. D.

    AC

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Correct answer: B

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