What is the chemical test used to measure blood alcohol content?

• A. Blood alcohol content
• B. Blood pressure test
• C. Cholesterol test
• D. Blood glucose test

Answer: (A)

To determine how much alcohol is in the bloodstream, we use a chemical analysis that directly quantifies ethanol in the blood. This measurement is called blood alcohol content, and the test is typically done on a blood sample, though a breath test can provide a close estimate of the BAC. The result is expressed as a percentage, such as 0.08%, indicating the amount of alcohol in the blood and helping determine impairment and legal limits. Other common tests—like checking blood pressure, cholesterol, or glucose—measure different things and don’t reveal alcohol content. So the BAC measurement itself is the tool used to assess alcohol in the system.