Step 1: Number of permanent teeth.
Children have a set of 20 primary (milk) teeth, but the question refers to permanent teeth, which develop after the milk teeth. Children usually get 20 permanent teeth by the age of 13, and then 12 more permanent teeth (for a total of 32) appear later during adolescence.
Step 2: Analyzing the options.
- (A) 10: This is incorrect. Children do not have 10 permanent teeth.
- (B) 15: This is incorrect. The correct number of permanent teeth in children is 20.
- (C) 20: This is correct. By the time children are around 12-13 years old, they typically have 20 permanent teeth.
- (D) 25: This is incorrect. The number of permanent teeth in children is not 25.
Step 3: Conclusion.
The correct answer is (C) 20, as children typically have 20 permanent teeth.
Final Answer:
The correct answer is (C) 20.