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: Pathology
After extraction radiotherapy should be avoided for: 
Select and explain. 
A. 7days., B. 10-14days., C. 15-20days., D. 30 days.
B: 10-14days.
Answer: B: 10-14days. 
Explanation: None