Which of the following statements are true about E-R diagrams? I. Entities and relationships are mapped to tables in the database.

II. E-R diagrams are useful for creating the initial set of normalized tables in the database.

III. An entity describes the association between two real-world objects.

IV. An E-R diagram is also known as the entity-relationship diagram.

I, II, III

I, II, IV

I, III, IV

II, III, IV