## **Core Concept**
The question tests knowledge of primary dentition, also known as milk teeth or baby teeth. Primary dentition begins to develop during fetal development and continues to erupt until the child is about 3 years old.

## **Why the Correct Answer is Right**
The correct number of milk teeth in a human child is 20. These teeth start coming in when the child is about 6 months old and continue to erupt until they are about 3 years old. The primary dentition includes incisors (8), canines (4), and molars (8), which are essential for chewing and guiding the permanent teeth into their correct positions.

## **Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify a number.
* **Option B:** This option is incorrect because it does not specify a number.
* **Option D:** This option suggests a different number of teeth, which is not accurate for milk teeth.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the primary dentition consists of 20 teeth. A useful mnemonic to recall the types and numbers of primary teeth is: "Incisors 8, Canines 4, Molars 8." Understanding the composition and timeline of primary dentition is crucial for pediatric dental care and monitoring dental development.

## **Correct Answer:** . 20