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: Dental
Bell stage for deciduous teeth; bud stage for permanent teeth, seen at: 
Select and explain. 
A. 32 weeks., B. 18 weeks., C. 14 weeks., D. 55 -56 days.
C: 14 weeks.
Answer: C: 14 weeks. 
Explanation: Time Line of Human Tooth Development