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
Single accessory canal arises from coronal 1/3rd in what percentage of mandibular molars 
Select and explain. 
A. 23%, B. 13%, C. 10%, D. None of the above
A: 23%
Answer: A: 23% 
Explanation: None