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
Lamina dura is: 
Select and explain. 
A. Radiographic appearance of bundle bone, B. Alveolar bone proper, C. Cribriform plate, D. All the above
A: Radiographic appearance of bundle bone
Answer: A: Radiographic appearance of bundle bone 
Explanation: None