This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Trauma, Subject name: Surgery
In triage of School bus accident of children which one will you attend first and give priority? 
Select and explain. 
A. Airway obstruction child, B. Boy who has Shock, C. Flail chest child, D. Severe Head injury
A: Airway obstruction child
Answer: A: Airway obstruction child 
Explanation: Ans. (a) Airway obstruction(Ref Page 413/ Sabiston 20th edition, Surgery Sixer 2nd Edition Page 106)This initial assessment, also termed the primary survey, follows the mnemonic ABCDE * Airway and cervical spine protection* Breathing* Circulation* Disability or neurologic condition* Exposure and environmental control