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': 'Calcium content of lamina dura is: \nSelect and explain. \nA. More than the other parts of alveolar bone, B. Less than the other parts of alveolar bone, C. Same as in other parts of alveolar bone, D. Less than the cementum', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]