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: Pediatrics
The primary dentition begins to show teeth eruption by- 
Select and explain. 
A. 6 weeks, B. 12 weeks, C. 6 months, D. 12months
A: 6 weeks
Answer: A: 6 weeks 
Explanation: Ans. is 'a' i.e., 6 weeks o Rule of six :- Primary (temporary) dentition begins --> 6 weeks. Secondary (permanent) dentition begins --> 6 years.