Q34

MSQ2 marks

The symbol $\rightarrow$ indicates functional dependency in the context of a relational database. Which of the following options is/are TRUE?

(A)

$(X, Y) \rightarrow(Z, W)$ implies $X \rightarrow(Z, W)$

(B)

$(X, Y) \rightarrow(Z, W)$ implies $(X, Y) \rightarrow Z$

(C)

$((X, Y) \rightarrow Z$ and $W \rightarrow Y)$ implies $(X, W) \rightarrow Z$

(D)

$(X \rightarrow Y$ and $Y \rightarrow Z)$ implies $X \rightarrow Z$

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