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
In mass causality cases, the mechanism to sort out patient is? 
Select and explain. 
A. Treating first patients with life threatening conditions, B. Treating patients with higher chances of survival with least available infrastructure, C. Treating patients with multiple organ failure & that need equipment and mobility, D. None
B: Treating patients with higher chances of survival with least available infrastructure
Answer: B: Treating patients with higher chances of survival with least available infrastructure 
Explanation: None