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 drugs are used as immunosuppressants EXCEPT : 
Select and explain. 
A. Glucocorticoids, B. Cyclosporine, C. Cephalosporin, D. Azathioprine
C: Cephalosporin
Answer: C: Cephalosporin 
Explanation: Cephalosporins are β-lactam antibiotics whereas other drugs are lmmunosuppressants.