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
At the age of 11, total number of teeth are : 
Select and explain. 
A. 12, B. 20, C. 24, D. 30
C: 24
Answer: C: 24 
Explanation: At age of 11number of teeth are 24, of which 20 are permanent consisting of 8 incisors, 4 molars, 8 premolars and 4 deciduous teeth. Number of teeth with age: Age Number of teeth 2-5 20(all deciduous) 6 21-24(eruption of first permanent molars) 7-9 24(12 permanent, 12 deciduous) 10 24(16 permanent, 8 deciduous) 11 24(20 permanent, 4 deciduous) 12-14 25-28(eruption of second permanent molars) 14-17 28(all permanent) 17-25 29-32(eruption of 3rd molars) Ref: Review of Forensic Medicine and Toxicology By Gautam Biswas page 8.