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
Cervical burnout is a phenomenon caused by 
Select and explain. 
A. Decreased X-ray absorption in the cervical region of teeth with proximal caries, B. Decreased X-ray absorption in the cervical region of normal teeth, C. Decreased X-ray absorption in the cervical region of teeth with root caries, D. Decreased X-ray absorption in the cervical region of hypoplastic teeth
B: Decreased X-ray absorption in the cervical region of normal teeth
Answer: B: Decreased X-ray absorption in the cervical region of normal teeth 
Explanation: None