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: Medicine
Which of the following drugs is not a part of the 'Triple Therapy' immunosuppression for post-renal transplant patients ? 
Select and explain. 
A. Cyclosporine, B. Azathioprine, C. FK 506, D. Prednisolone
C: FK 506
Answer: C: FK 506 
Explanation: None