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: Forensic Medicine
Xiphoid process fuses with body of sternum by: 
Select and explain. 
A. 10 years, B. 20 years, C. 30 years, D. 40 years
D: 40 years
Answer: D: 40 years 
Explanation: 40 years