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 disclosing solution differentiates between mature and newly formed plaque: 
Select and explain. 
A. Iodine, B. Erythrosine, C. Two tone dye solution, D. Mercurochrome
C: Two tone dye solution
Answer: C: Two tone dye solution 
Explanation: None