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 tooth with a chronic alveolar abscess would have all the following features EXCEPT \nSelect and explain. \nA. Always symptomatic, B. Detected only during routine radiographic examination, C. Presence of a sinus tract, D. The sinus tract provides continual drainage of the periradicular lesion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]