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: Dental
Which of the following cytokines cause bone resorption? 
Select and explain. 
A. IL-1, B. IL-8, C. IFN-gamma, D. IL-4
A: IL-1
Answer: A: IL-1 
Explanation: None