Q21

MSQ1 mark

In the context of relational database normalization, which of the following statements is/are true?

(A)

It is always possible to obtain a dependency-preserving $3$ NF decomposition of a relation

(B)

It is always possible to obtain a dependency-preserving $1$ NF decomposition of a relation

(C)

It is not always possible to obtain a dependency-preserving BCNF decomposition of a relation

(D)

It is not always possible to obtain a dependency-preserving $2$ NF decomposition of a relation

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