**Core Concept**
Nodular growth of alveolus, also known as a radiolucent lesion within the alveolar bone, is a characteristic feature of cementifying fibroma. This type of lesion is a benign fibro-osseous growth that typically occurs in the jawbone and is composed of cementum-like material.

**Why the Correct Answer is Right**
Cementifying fibroma is a distinct entity within the spectrum of fibro-osseous lesions, characterized by the presence of cementum-like material within a fibrous stroma. The lesion typically grows in a nodular fashion, displacing the surrounding bone and causing an alveolar expansion. The cementum-like material is deposited in a disorganized manner, giving the lesion its characteristic radiolucent appearance on radiographs. This type of lesion is often seen in the mandible, particularly in the posterior region.

**Why Each Wrong Option is Incorrect**

* **Option A:** Paget's disease is a chronic, localized skeletal disorder characterized by an abnormal breakdown and regrowth of bone tissue. While it can cause an expansion of the alveolar bone, it is not typically associated with a nodular growth pattern.
* **Option B:** Osteomas are benign bony growths that can occur in various parts of the skull and face. However, they are not typically characterized by a nodular growth of the alveolus and are often radiopaque rather than radiolucent.

**Clinical Pearl / High-Yield Fact**
It's essential to distinguish between cementifying fibroma and other fibro-osseous lesions, as cementifying fibroma has a characteristic appearance on radiographs and is often seen in the jawbone. A key feature to look for is the presence of a radiolucent lesion with a well-defined border, which is a hallmark of cementifying fibroma.

**✓ Correct Answer: C. Cementifying fibroma**