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: Dental
Following fracture of the root, the reaction to test of pulp vitality may be negative for as long as ………..weeks 
Select and explain. 
A. 6-8 weeks, B. 10-12 weeks, C. 20-24 weeks, D. 1-2 weeks
A: 6-8 weeks
Answer: A: 6-8 weeks 
Explanation: None