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': 'Cementum that forms in conjunction with root end formation and eruption \nSelect and explain. \nA. Cellular cementum, B. Acellular cementum, C. Both of the above, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]