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
Four carpal bones are present at what age: DNB 09 
Select and explain. 
A. 3 years, B. 4 years, C. 5 years, D. 6 years
B: 4 years
Answer: B: 4 years 
Explanation: Ans. 4 years