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: Radiology
Radiographs are of no help in the diagnosis of 
Select and explain. 
A. Cementoma, B. Subluxation teeth, C. Acute alveolar abscess, D. Impacted canines
C: Acute alveolar abscess
Answer: C: Acute alveolar abscess 
Explanation: None