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
Radiographically the level of the normal inter proximal alveolar crest is related to the 
Select and explain. 
A. Position of cemento - enamel junctions of the approximal teeth, B. Epithelial attachment, C. Anatomy of the alveolar process, D. Location of the Gingival attachment
A: Position of cemento - enamel junctions of the approximal teeth
Answer: A: Position of cemento - enamel junctions of the approximal teeth 
Explanation: None