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 immunosuppressants is not used for the treatment of cancers ? 
Select and explain. 
A. Cyclophosphamide, B. Cyclosporine, C. Methotrexate, D. 6–Mercaptopurine
B: Cyclosporine
Answer: B: Cyclosporine 
Explanation: None