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': 'Site for EPT over anterior teeth: \nSelect and explain. \nA. Incisal edges., B. Mid facial surface., C. Incisal third of facial surface., D. Any of the above.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Highest density of A delta fibers is at pulp horn.', 'role': 'assistant'}]