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: Pharmacology
Which of the following steroids is not used topically: 
Select and explain. 
A. Hydrocoisone, B. Fluticasone, C. Triamcinolone, D. Prednisonlone
D: Prednisonlone
Answer: D: Prednisonlone 
Explanation: Prednisonlone