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
Denileukin diftitox binds to : 
Select and explain. 
A. IL-1, B. IL-2, C. IL-4, D. IL-5
B: IL-2
Answer: B: IL-2 
Explanation: Denileukin diftitox binds to IL-2 receptors on CD8 cells and causes death of the cells by diptheria toxin.
It is used in the treatment of Cutaneous T-cell lymphoma.