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
Apical foramen is found at root apex in 
Select and explain. 
A. 17-46% of cases, B. 5-10 % of cases, C. 10-30% of cases, D. 100% of cases
A: 17-46% of cases
Answer: A: 17-46% of cases 
Explanation: None