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: Surgery
After Renal transplantaton, which drug is given:a) Cyclophosphamideb) Corticosteroidsc) Interferond) Cyclosporine 
Select and explain. 
A. c, B. d, C. ab, D. bd
D: bd
Answer: D: bd 
Explanation: None