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
Primary dentition period is: 
Select and explain. 
A. From birth to 11 years, B. From 6 months to 11 years, C. From 6 months to 6 years, D. From 6 years to 11 years
C: From 6 months to 6 years
Answer: C: From 6 months to 6 years 
Explanation: None