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 radiotherapy, extraction should be avoided for at least: 
Select and explain. 
A. 1month., B. 2months., C. 6months., D. 12months
B: 2months.
Answer: B: 2months. 
Explanation: None