This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth and development, Subject name: Pediatrics
Primary Dentition begins to show teeth eruption by __________ 
Select and explain. 
A. 6 weeks, B. 12 weeks, C. 6 months, D. 12 months
C: 6 months
Answer: C: 6 months 
Explanation: Primary dentition to appear first is the lower central incisors at 6-10 months of age. Ref- Ghai , 9th edition , Table 2.2