Question: An attribute ( s ) that acts as a foreign key in a relation must be part of the primary key of that relation must

An attribute(s) that acts as a foreign key in a relation
must be part of the primary key of that relation
must also be a foreign key in another relation of the database
cannot be part of the primary key of that relation
must be the entire primary key of that relation
None of the given choices
An attribute(s) that acts as a foreign key in a relation

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