This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
Which of the following drugs is not used for the treatment of cancer 
Select and explain. 
A. Cyclophosphamide, B. Cyclosporine, C. Methotrexate, D. 6-mercaptopurine
B: Cyclosporine
Answer: B: Cyclosporine 
Explanation: Ref-KDT 6/e p839,840 All antimetabolite can be used as anticancer drugs excepts azathioprine Cyclosporine acts by inhibiting the transcription of IL-2 gene.it has no anti-cancer propey