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 preferred for high dose intravenous corticosteroid pulse therapy ? 
Select and explain. 
A. Cortisone, B. Hydrocortisone, C. Triamcinolone, D. Methyl–prednisolone
D: Methyl–prednisolone
Answer: D: Methyl–prednisolone 
Explanation: None