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
Reactionary hemorrhage occurs within - 
Select and explain. 
A. 1-2 days, B. 2-7 days, C. <24 hours, D. After 7 days
C: <24 hours
Answer: C: <24 hours 
Explanation: None