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
All of the following are immunosuppressive drugs EXCEPT : 
Select and explain. 
A. Cyclosporine, B. Cefaclor, C. Azathioprine, D. Steroids
B: Cefaclor
Answer: B: Cefaclor 
Explanation: Cefaclor is a cephalosporin