This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
What is not found in head injury: March 2007 
Select and explain. 
A. Confusion, B. Loss of consciousness, C. Lucid interval, D. GCS score of O
D: GCS score of O
Answer: D: GCS score of O 
Explanation: Ans. D: GCS score of O