What Is a Primary Key

question 10

Multiple Choice

What is a primary key?

• A)A field that uniquely identifies a given record in a table.
• B)A primary key of one table that appears as an attribute in another table and acts to provide a logical relationship between the two tables.
• C)A table that uniquely identifies a given record in a field.
• D)A foreign key of one table that appears as an entity in another table and acts to provide a logical relationship between the two records.

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Definitions:

Midline of Body

An imaginary line that divides the body into equal right and left halves, often used as a reference point in medical and fitness contexts.

Cardiovascular System

The body's system comprising the heart and blood vessels, responsible for circulating blood and oxygen throughout the body.

At Least Two Atoms

A molecule that consists of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

Molecules

The smallest units of a chemical substance that can exist independently while retaining the composition and chemical properties of the substance.