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': 'Acellular cementum is typically found in: \nSelect and explain. \nA. Coronal half of root, B. Apical half of root, C. Apex of root, D. Entire root', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]