After being hit on the head, Bob experienced some retrograde amnesia. Those who were there knew this because he
A) was unconscious.
B) had a concussion.
C) could not remember his name.
D) did not know what happened.

Question

Quizplus · Accepted Answer

Retrograde amnesia involves the loss of pre-existing memories, so Bob's inability to remember what happened before the incident indicates retrograde amnesia.

After Being Hit on the Head, Bob Experienced Some Retrograde