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

question 9

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) creating a third relation to represent the relationship between the two entities.
• E) either A or B.

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Definitions:

Immunity

The ability of an organism to resist and fend off pathogens, diseases, and infections through the immune response.

Homeostasis

The self-regulating process by which biological systems maintain stability while adjusting to changing external conditions.

Neuropeptides

Small protein-like molecules used by neurons to communicate with each other, often playing a role in pain, reward, food intake, learning, and memory.

Aspirin

A medication used to reduce pain, fever, inflammation, and, in low doses, to prevent blood clots.