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': 'A patient feels that his molar is extruded from the socket and is tender to percussion. This can be due to \nSelect and explain. \nA. Periapical cyst, B. Periapical granuloma, C. Periapical abscess, D. Furcation involvement', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]