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: Unknown
Basioccipital basisphenoid will fuse at: 
Select and explain. 
A. 21-25 years, B. 35-45 years, C. 25-30 years, D. 30-40 years
A: 21-25 years
Answer: A: 21-25 years 
Explanation: Ref. Textbook of forensic medicine. Krishnan Vij. Page.42