For a Unary One-To-One Relationship Between Two Entities a and B,the

question 120

Multiple Choice

For a unary one-to-one relationship between two entities A and B,the relationship is represented by:

• A)adding the primary key of A as a foreign key of B
• B)adding the primary key of B as a foreign key of A
• C)combining the two entities into one relation
• D)either A or B