When is passing on the right not permitted?

Answer: B — When driving in a lane set aside for left turns

Passing on the right is not permitted when driving in a lane set aside for left turns because such a lane is specifically designated for turning left. This restriction helps prevent collisions and ensures that drivers can navigate intersections safely. When vehicles are in a left turn lane, they are preparing to change direction, and passing them on the right could create confusion and increase the risk of accidents. In many driving scenarios, such as highways with multiple lanes, residential areas, or when vehicles are traveling below the speed limit, there are typically more opportunities for safe passing. However, the left turn lane serves a unique purpose that prioritizes safety and orderly movement through intersections.