How many teeth are present in 3 year old ___________
**Core Concept**
The question tests the knowledge of dental development in children, specifically the number of teeth present at a certain age. At 3 years old, children typically have a full set of **primary teeth**. The development of teeth is a continuous process, and the number of teeth present at different ages is an important aspect of pediatric dentistry.
**Why the Correct Answer is Right**
A 3-year-old child usually has a complete set of **primary dentition**, which includes 20 teeth. These teeth start erupting when the child is around 6 months old and continue to appear until they are about 3 years old. The primary dentition is made up of **incisors**, **canines**, and **molars**.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not match the typical number of teeth present in a 3-year-old child.
**Option B:** This option is also incorrect as it underestimates the number of teeth.
**Option D:** This option is incorrect because it overestimates the number of teeth.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that the number of teeth in a child's mouth can vary slightly due to individual developmental differences. However, 20 is the standard number for primary teeth in a healthy 3-year-old child.
**Correct Answer:** B. 20