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
Prevalence of pit & fissure caries is measured with: 
Select and explain. 
A. ICDAS, B. DMF, C. def/dmf, D. Transillumination
D: Transillumination
Answer: D: Transillumination 
Explanation: Prevalence of pit & ﬁssure caries is measured with transillumination.