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
Chronic periapical infection in primary molars is first
noted as 
Select and explain. 
A. Rarefaction of bony furcation, B. As internal resorption, C. As rarefaction of Periapical tissues, D. Widening of Periodontal ligament space
A: Rarefaction of bony furcation
Answer: A: Rarefaction of bony furcation 
Explanation: None