Q. What is the use of Referential Integrity in MS Access? (Solved)

1. It allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table

2. It does not allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table

3. It allow to enter a value in the Primary key field of a child table if that value exist in the Foreign key of the parent table

4. None of above