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
Sorting a patient of trauma of head injury on basis of need of care and availability of resources 
Select and explain. 
A. Triage, B. Emergency care, C. Definitive care, D. Hospital care
A: Triage
Answer: A: Triage 
Explanation: None