Question: What is a foreign key in a database? A field that is a reference to a primary key in another table. A field in a

What is a foreign key in a database?
A field that is a reference to a primary key in another table.
A field in a table that prevents the duplication of data.
A field in the database that can have duplicate value.
A field that does not exist in the current table but is present in another table.

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