**Core Concept**
The most common developmental cyst of the jaws is related to **odontogenic cysts**, which arise from the epithelial remnants of tooth development. These cysts are typically lined by epithelium and can be found in the mandible or maxilla. The development of these cysts is often associated with the formation of teeth.

**Why the Correct Answer is Right**
The correct answer is related to the **radicular cyst**, also known as a periapical cyst, which is the most common type of odontogenic cyst. It typically forms at the apex of a non-vital tooth as a result of **chronic infection**. The cyst is lined by **stratified squamous epithelium** and is often associated with the roots of teeth.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because, although it is a type of cyst, it is not the most common developmental cyst of the jaws.
**Option B:** This option is also incorrect as it is not typically considered the most common developmental cyst.
**Option D:** Similarly, this option is incorrect as it does not represent the most common developmental cyst of the jaws.

**Clinical Pearl / High-Yield Fact**
The **radicular cyst** is a key example of an odontogenic cyst, and its formation is closely linked to **tooth development** and **infection**. Recognizing the relationship between tooth formation and cyst development is crucial for diagnosis and treatment.

**Correct Answer:** D. Radicular cyst