In a crash, which is NOT one of the three collisions?

• A. External
• B. Vehicle
• C. Human
• D. Internal

Answer: (A)

The concept being tested is how crash injuries are explained by three sequential impacts. In this framework, injuries come from the vehicle colliding with something external, the occupant colliding with the interior of the vehicle, and the internal organs colliding within the body. However, in many course explanations the three distinct categories are described as vehicle collision, human collision, and internal collision. The term external describes the initial impact between the vehicle and the outside environment and is not listed as one of the three internal categories. That’s why external is the correct answer here. The other options map directly to the defined collisions: vehicle collision is the car hitting something outside, human collision is the occupant hitting the interior, and internal collision is the organs colliding with the body.