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
[{'content': 'Accessory canals are most frequently found in: \nSelect and explain. \nA. The cervical one third of the root, B. The middle one third of the root, C. The apical one third of the root, D. With equal frequency in all the above mentioned', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]