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
Long acting glucocoicoid is ? 
Select and explain. 
A. Dexamethasone, B. Triamcenolone, C. Prednisolone, D. Hydrocoisone
A: Dexamethasone
Answer: A: Dexamethasone 
Explanation: Ans. is 'a' i.e., Dexamethasone