**Core Concept:** Cherubism is a rare, autosomal dominant disorder affecting jaw bones with potential facial deformity, dental abnormalities, and normal intelligence. It is caused by mutations in the SH3BP2 gene, which leads to abnormal bone remodeling.

**Why the Correct Answer is Right:** Cherubism is a rare genetic disorder characterized by bilateral, symmetrical, and painless enlargement of the mandible and maxilla. The characteristic feature of cherubism includes the following:

1. **Option A (Enlargement of jaws):** Cherubism leads to the enlargement of the mandible and maxilla due to excessive bone resorption and new bone formation. This results in a characteristic "cherubic" appearance with protruding and soft facial features.

2. **Option B (Dental abnormalities):** Patients with cherubism often present with tooth mobility, delayed eruption, and malocclusion due to the abnormal bone growth affecting the dental arch.

3. **Option C (Normal intelligence):** Despite the significant jaw deformities, individuals with cherubism maintain normal intelligence and cognitive function.

4. **Option D (Facial deformity):** Cherubism primarily affects the facial bones, causing the characteristic "cherubic" facial appearance, but it does not typically lead to severe facial deformity.

**Why Each Wrong Option is Incorrect:**

1. **Option A (Severe facial deformity):** Cherubism primarily affects the jaw bones, causing dental abnormalities and jaw enlargement. Although the face may appear "cherubic," severe facial deformity is not a typical feature of the disorder.

2. **Option B (Limb enlargement):** Cherubism affects the facial bones, not the limbs.

3. **Option C (Severe developmental delay):** Individuals with cherubism maintain normal intelligence and cognitive function, as mentioned above. The disorder does not affect cognitive development.

4. **Option D (Extensive facial fractures):** Cherubism is a benign condition and does not lead to fractures or severe trauma in affected individuals.

**Clinical Pearl:** Cherubism is a benign disorder that primarily affects the jaw bones, resulting in dental abnormalities and jaw enlargement. While cherubism may lead to a distinctive facial appearance, it does not typically cause severe facial deformity, limb enlargement, developmental delay, or extensive fractures.