This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Dental
The most potent topical coicosteroids is - 
Select and explain. 
A. Hydrocoisone 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: Super potent topical coicosteroids Clobetasol propionate 0.05% halobetasolpropionate 0.05% betametnasone dipropionate 0.05% Fitzpatricks textbook of dermatology, principles of topical therapy page 3363