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
Difference between Fluoride Gel and Varnish: 
Select and explain. 
A. Gel given by tray where as varnish cannot, B. Gel application is not for office use, C. More number of applications can be done by varnish, D. Gel penetrates the inter proximal surface better, while varnish cannot
A: Gel given by tray where as varnish cannot
Answer: A: Gel given by tray where as varnish cannot 
Explanation: None