Question a brain injury is classified as nontraumatic if it is

Since i don't know the options you have i'm just going to explain what non traumatic brain injury is.

When we call a brain injury traumatic it may include open head injuries(like a gunshot wound) or or closed head injuries (like blunt trauma).
On the other hand, non-traumatic brain injuries may include those caused by strokes, nontraumatic hemorrhage, tumor, infectious diseases, hypoxic injuries, toxic exposure blunt trauma. Basically the non-traumatic injury doesn't depend of something outside the body.