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: Social & Preventive Medicine
In a disaster management triage, patients who need surgery within 24 hours, are categorized under which color category 
Select and explain. 
A. Red, B. Blue, C. Green, D. Black
B: Blue
Answer: B: Blue 
Explanation: None