This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
In cases of severe head trauma, at what GCS is endotracheal intubation is advised 
Select and explain. 
A. <=3, B. <=8, C. 10, D. 12
B: <=8
Answer: B: <=8 
Explanation: In cases of severe head trauma, where the patient is unconscious (a Glasgow Coma Score (GCS) of 8 or less), then a definitive airway (such as endotracheal intubation) may be required- Bailey