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': 'According to the location, a pulp stone partly surrounding by pulp and fused to dentine is called as: \nSelect and explain. \nA. Attached pulp stone., B. Embedded pulp stone., C. Free pulp stone., D. None.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]