Question: If the restrict option is chosen when enforcing the Referential Integrity rule, what happens when a user tries to delete a primary key value that

If the "restrict" option is chosen when enforcing the Referential Integrity rule, what happens when a user tries to delete a primary key value that is NOT referenced in the foreign key column?
DBMS will delete this primary key value and replace it with a null value.
The entire row associated with this primary key will be deleted.
The DBMS will set all values in the foreign key to null values.
 If the "restrict" option is chosen when enforcing the Referential Integrity

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