Final answer:
Option A). A graduated cylinder is used for the API gravity test to measure the volume of liquids accurately.
Step-by-step explanation:
A graduated cylinder is the kind of cylinder used for the American Petroleum Institute (API) gravity test. These cylinders are crucial components of lab apparatus and are employed in precise liquid volume measurement. Graduated cylinders provide the accuracy needed for the API gravity test. They are available in a range of sizes and can measure volumes in milliliters and centiliters. The cylinder is used to determine the specific gravity of petroleum samples in the API gravity test. Hence, Option A) is the correct answer.