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
Most common type of radiation caries: 
Select and explain. 
A. Superficial lesions involving all tooth surfaces, B. Cervical lesion, C. Dark pigmentation of the entire crown, D. All of the above
A: Superficial lesions involving all tooth surfaces
Answer: A: Superficial lesions involving all tooth surfaces 
Explanation: All the given option are types of radiation-induced caries.
Key Point:
Most common type–Superﬁcial lesions involving all tooth surfaces.