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
Which of the following dyes is used for detection of enamel caries? 
Select and explain. 
A. Acid red system, B. Zygo ZL-22, C. α - Aminoacridine, D. All the above
B: Zygo ZL-22
Answer: B: Zygo ZL-22 
Explanation: CARIES DETECTION DYES
 
Enamel Caries: 

0.5% Basic fuschin 
Zygo ZL-22 
Fuschin

Dentinal Caries:

Acid red system 
α - Aminoacridine