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: Medicine
All are used in hairy cell leukemia except - 
Select and explain. 
A. Steroids, B. Alpha interferon, C. Pentostatin, D. Splenectomy
A: Steroids
Answer: A: Steroids 
Explanation: None