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
A boy has 20 permanent teeth and 8 temporary teeth. His age is likely to be : 
Select and explain. 
A. 9 yrs., B. 10 yrs., C. 11 yrs., D. 12 yrs.
B: 10 yrs.
Answer: B: 10 yrs. 
Explanation: B i.e. 10 years