Question-46

DBMS

In a schema with attributes \(A, B, C, D\) and \(E\) following set of functional dependencies are given

\(A \rightarrow B\)
\(A \rightarrow C\)
\(CD \rightarrow E\)
\(B \rightarrow D\)
\(E \rightarrow A\)

Which of the following functional dependencies is NOT implied by the above set?

\(CD \rightarrow AC\)
\(BD \rightarrow CD\)
\(BC \rightarrow CD\)
\(AC \rightarrow BC\)

Answer

\(CD \rightarrow AC\)
\(BD \rightarrow CD\)
\(BC \rightarrow CD\)
\(AC \rightarrow BC\)