This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and Health, 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. Green, C. Blue, D. Black
C: Blue
Answer: C: Blue 
Explanation: Ans. (c) BlueRef: K. Park 23rd ed. / 795-97* In a disaster management, categorization of victims are done on the basis of likelihood of survival.Triage color code and their significanceCategoryColorRemarks/stepsCategory 1RedHighest priority- patient immediate resuscitations or life-saving surgery (0 to 6 hr)Category 2Yellow/ blueHigh priority resuscitation or life saving surgery (within 6 to 24hr)Category 3GreenAmbulatory/ low minor injuries; non-life threatingCategory 4BlackDead, Moribund; least priority