A ____ Is One Where Multiple Keys Are Needed to Identify

question 26

Multiple Choice

A ____ is one where multiple keys are needed to identify a tuple uniquely.

• A)unique primary key
• B)discrete primary key
• C)foreign primary key
• D)composite primary key

---

Definitions:

2-Phenylethanol

A fragrant organic compound with rose-like odor, used in perfumery and as a flavoring agent, featuring both a phenyl group and an ethanol group.

Cold Chromic Acid

Cold Chromic Acid is a solution of chromium trioxide in water and sulfuric acid, used as an oxidizing agent at low temperatures in organic chemistry.

1H NMR Signal

A peak or signal observed in hydrogen-1 nuclear magnetic resonance spectroscopy that provides information about the local environment of hydrogen atoms in a compound.

Carboxyl Group's Hydrogen

The hydrogen atom attached to the oxygen in the carboxyl functional group -COOH, known for its acidity.