## Core Concept
The process of exfoliation of primary teeth, also known as shedding of primary teeth, is a natural process that occurs as the permanent teeth develop and push against the roots of the primary teeth. This process involves the resorption of the roots of primary teeth, which leads to their eventual loss.

## Why the Correct Answer is Right
The correct answer, , indicates that the process of exfoliation of primary teeth begins around 6 years of age. This is because, on average, the first permanent teeth (incisors) start coming in around this age, and they initiate the process of root resorption in the primary teeth. The process continues until about 12-14 years of age, as more permanent teeth erupt and replace the primary ones.

## Why Each Wrong Option is Incorrect
* **Option A:** . This option suggests that exfoliation starts too early, around 3 years of age, which is not accurate as primary teeth typically start falling out around the age of 6.
* **Option B:** . This option suggests a narrower timeframe than what is typically observed for the process of exfoliation.
* **Option D:** . This option suggests that exfoliation starts too late, around 10 years of age, which misses the early onset of this process.

## Clinical Pearl / High-Yield Fact
A key point to remember is that the sequence of tooth exfoliation generally follows the sequence of tooth eruption. The first primary teeth to be shed are usually the central incisors, followed by the lateral incisors, first molars, canines, and finally, the second molars. Understanding this sequence can help in assessing the normal development and timing of dental milestones in children.

**Correct Answer: C. 6-14 years.**