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 most potent topical corticosteroids is – 
Select and explain. 
A. Hydrocortisone butyrate cream 0.1%, B. Betamethasone valerate cream 0.1%, C. Clobetasol propionate cream 0.5%, D. Clobetasone butyrate cream 0.5%
C: Clobetasol propionate cream 0.5%
Answer: C: Clobetasol propionate cream 0.5% 
Explanation: Clobitasol propionate 0.5% is a superpotent (class 1-most potent class) topical steroid.