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
A tooth with a chronic alveolar abscess would have all the following features EXCEPT 
Select and explain. 
A. 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
A: Always symptomatic
Answer: A: Always symptomatic 
Explanation: None