**Core Concept**
Basal cell carcinoma (BCC) is a type of skin cancer that arises from the basal cell layer of the epidermis. It is the most common form of skin cancer, accounting for approximately 80% of all skin cancer cases. BCC is characterized by its slow growth and local invasion, but it rarely metastasizes.

**Why the Correct Answer is Right**
The diagnostic procedure for basal cell carcinoma typically involves a biopsy, where a tissue sample is obtained and examined under a microscope for characteristic histological features. The most common histological types of BCC are nodular, superficial, and morpheaform. A biopsy can be performed using shave biopsy, punch biopsy, or excisional biopsy, depending on the location and size of the lesion. The histopathological examination of the biopsy specimen is essential for confirming the diagnosis of BCC.

**Why Each Wrong Option is Incorrect**
**Option A:** While imaging studies such as X-rays or CT scans can help in detecting BCC, they are not the primary diagnostic procedure. Imaging studies are often used to assess the extent of the tumor or to guide further treatment.
**Option B:** Fine-needle aspiration cytology (FNAC) may be used to diagnose BCC, but it is not the preferred method. FNAC can provide a rapid diagnosis, but it may not always provide a definitive diagnosis, especially in cases of atypical or indeterminate lesions.
**Option C:** While skin scrapings can be used to diagnose various skin conditions, they are not typically used for diagnosing BCC. Skin scrapings are more useful for diagnosing conditions such as eczema or psoriasis.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that BCC can be mistaken for other skin conditions, such as keratoacanthoma or seborrheic keratosis. A definitive diagnosis can only be made by histopathological examination of a biopsy specimen.

**Correct Answer:** C.