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
Immunosuppressant drug inhibiting the action oh IL-3 without inhibiting it's transaction is 
Select and explain. 
A. Prednisolone, B. Cyclosporine, C. Tacrolimus, D. Sirolimus
D: Sirolimus
Answer: D: Sirolimus 
Explanation: Ref-Katzung 10/e p918 Sirolimus, also known as rapamycin, is a macrolide compound that is used to coat coronary stents, prevent organ transplant rejection and to treat a rare lung disease called lymphangioleiomyomatosis. It has immunosuppressant functions in humans and is especially useful in preventing the rejection of kidney transplants.