Which scenario would be considered a loss under the Comprehensive coverage of OAP 1?

The scenario where your client’s windshield was smashed by a falling boulder would be considered a loss under the Comprehensive coverage of OAP 1 because Comprehensive coverage is designed to protect against damages not involving a collision with another vehicle. This type of insurance covers events such as theft, vandalism, and natural disasters, as well as damage caused by falling objects. In this case, the falling boulder is an external factor that caused damage to your client's vehicle, which aligns perfectly with the nature of Comprehensive coverage.

In contrast, the other scenarios involve different coverage types. Damage from hitting a pothole pertains more to collision-related issues, while hitting another vehicle while passing on a bridge clearly involves a collision scenario, which falls under collision coverage. The trailer striking the vehicle while towing also results in a collision-type incident. Therefore, option B is the only scenario that clearly fits the definition and coverage provided by Comprehensive insurance.