Choose the odd one out from the following options.

Concept: In an odd-one-out classification question, three items typically share one category or level — often all individual parts of something larger — while the fourth item breaks that pattern, usually because it belongs to a different level, such as the whole rather than a part.

Application: Tyre, steering wheel, and engine are each a single mechanical component — individual parts fitted together to build a vehicle. A car is not a single component; it is the complete assembly made up of many such parts, including the three listed here.

• Tyre — a specific component of a vehicle.

• Steering wheel — a specific component of a vehicle.

• Engine — a specific component of a vehicle.

• Car — the complete assembled vehicle, not a single component.

Cross-check: Three items belong to the same level (individual parts); only one item belongs to a different level (the whole assembly). That confirms the whole-versus-part distinction as the basis of the classification.

Since three items are individual parts and one item is the complete vehicle they combine to form, the item that stands apart is the car.