Q6

MCQ1 mark, −0.33

Consider the following statements $S1$ and $S2$ about the relational data model: $S1$ : A relation scheme can have at most one foreign key. $S2$ : A foreign key in a relation scheme $R$ cannot be used to refer to tuples of $R.$ Which one of the following choices is correct?

(A)

Both $S1$ and $S2$ are true

(B)

$S1$ is true and $S2$ is false

(C)

$S1$ is false and $S2$ is true

(D)

Both $S1$ and $S2$ are false

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