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
Dentist prescribed home applied bleaching technique uses: 
Select and explain. 
A. 35% Hydrogen Peroxide, B. 10% Carbamide peroxide, C. 18% Hydrochloric acid, D. Sodium perborate
B: 10% Carbamide peroxide
Answer: B: 10% Carbamide peroxide 
Explanation: HOME BLEACHING TECHNIQUE/NIGHT GUARD BLEACHING
Commonly used solution for night guard bleaching 

10% carbamide peroxide with or without carbopol.
15% carbamide peroxide.
Hydrogen peroxide (1-10%).