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
Least potent topical steroid 
Select and explain. 
A. Clobetasol propionate 0.5%, B. Betamethasone dipropionate 0.05%, C. Halobetasol propionate 0.05%, D. Hydrocoisone 1%
D: Hydrocoisone 1%
Answer: D: Hydrocoisone 1% 
Explanation: Least potent coicosteroids hydrocoisone 1% desonide 0.05% coisone 25% Fitzpatrick textbook of dermatology page 3363