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
The mucogingival junction can be demonstrated by 
Select and explain. 
A. Gention boiler, B. Schiler's potassium solution., C. Disclosing solution., D. Chlorhexidine.
B: Schiler's potassium solution.
Answer: B: Schiler's potassium solution. 
Explanation: Lugols iodine (or) schillers solution is used to stain keratinized gingival.