**Core Concept**
Basal cell carcinoma (BCC) is the most common form of skin cancer, primarily resulting from exposure to ultraviolet (UV) radiation. It arises from the basal cell layer of the epidermis, leading to uncontrolled growth of abnormal cells.

**Why the Correct Answer is Right**
The most common site for basal cell carcinoma is the face, particularly the sun-exposed areas such as the nose, cheeks, and forehead. This is due to the high concentration of melanocytes in these areas and the increased exposure to UV radiation from the sun or tanning beds. The UV radiation damages the DNA of the skin cells, leading to mutations in the p53 tumor suppressor gene and subsequent uncontrolled cell growth.

**Why Each Wrong Option is Incorrect**
**Option A:** While basal cell carcinoma can occur on the trunk and extremities, these sites are less common than the face.
**Option B:** Although basal cell carcinoma can occur in the eyes, this is a rare presentation and not the most common site.
**Option C:** Basal cell carcinoma is not typically associated with the scalp, which is more commonly affected by other types of skin cancers such as squamous cell carcinoma.

**Clinical Pearl / High-Yield Fact**
BCC is the most common skin cancer, with a high cure rate when treated early, but it can still cause significant morbidity due to local destruction and disfigurement.

**Correct Answer:** C. Face.