Q67

MCQ2 marks, −0.5

Consider the following implications relating to functional and multivalued dependencies given below, which may or may not be correct. Exactly how many of the above implications are valid? $0$ $1$ $2$ $3$

(A)

if $A \rightarrow \rightarrow B$ and $A \rightarrow \rightarrow C$ then $A \rightarrow BC$

(B)

if $A \rightarrow B$ and $A \rightarrow C$ then $A \rightarrow \rightarrow BC$

(C)

if $A \rightarrow \rightarrow BC$ and $A \rightarrow B$ then $A \rightarrow C$

(D)

if $A \rightarrow BC$ and $A \rightarrow B$ then $A \rightarrow \rightarrow C$

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