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
Anorganic bone is an example of: 
Select and explain. 
A. Autografts, B. Alloplasts, C. Xenografts, D. Allografts
C: Xenografts
Answer: C: Xenografts 
Explanation: None