In which of the following situations is it permissible to overtake on the left?

Overtaking on the left is permissible in situations where traffic allows for safer and more efficient movement. On a four-lane road, where multiple lanes in both directions are available and align with the traffic rules, overtaking on the left can be done safely. This structure provides ample space to maneuver without disrupting traffic flow or placing yourself in a risky position.

In contrast, the other scenarios presented may involve restrictions. For example, on a three-lane road or a one-way street with two lanes, conflicting traffic might arise, making overtaking on the left potentially hazardous. Likewise, a wide bend in the road can limit visibility and increase safety risks for overtaking, regardless of the lane configuration. Proper understanding of road regulations in various situations is essential for safe driving practices.