The correct answer is D) ball bearing. A ball bearing is an example of an antifriction bearing, which is a type of bearing that uses rolling elements (such as balls or rollers) to reduce friction between moving parts. Ball bearings are commonly used in a variety of applications, including machinery, vehicles, and even household appliances, due to their ability to provide smooth and efficient operation. The other options are not examples of antifriction bearings. A line shaft or spring bearing (A) is a type of plain bearing, which uses sliding contact between the bearing surfaces. A Kingsbury thrust bearing (B) is a type of fluid-film bearing, which relies on a thin film of lubricant to separate the surfaces. A rubber cutlass strut bearing (C) is a type of plain bearing that uses a rubber bushing to reduce vibration and wear.