Question: Consider the universal relation R = {A, B, C, D} and the set of functional dependencies FD = {{b} {d}} and the set of MVDs

Consider the universal relation R = {A, B, C, D} and the set of functional dependencies FD = {{b} {d}} and the set of MVDs = {{a,b} {c}}.

a. Write all the candidate keys for R.

b. What schema(s) would be produced by the 4NF decomposition algorithm?

A. R1={a,b,c,d} B. R1={b,d}, R2={a,b,c} C. R1={a,b,c},R2={a,b,d} D. R1={b,c},R2={b,d},R3={b,a}

E. none of the above

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