## **Core Concept**
Celiac sprue, also known as celiac disease, is a chronic autoimmune disorder primarily affecting the small intestine, triggered by ingestion of gluten in genetically predisposed individuals. The condition leads to mucosal damage, malabsorption, and various clinical manifestations. It is associated with specific genetic markers and has links to other autoimmune conditions.

## **Why the Correct Answer is Right**
The correct answer, **C. HLA DQ2 and DQ8**, is right because celiac disease has a strong association with specific HLA (human leukocyte antigen) genotypes, notably HLA-DQ2 and HLA-DQ8. These genetic markers are found in the majority of patients with celiac disease and are considered necessary but not sufficient for the disease to develop. The HLA-DQ2 haplotype is present in about 90-95% of patients with celiac disease, while HLA-DQ8 is found in most of the remaining patients.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because while there are various genetic associations with diseases, the specific and proved association with celiac sprue is with HLA DQ2 and DQ8, not with other HLA types.
- **Option B:** This option is incorrect as it does not specify the correct genetic markers associated with celiac disease.
- **Option D:** This option is incorrect because it does not accurately represent the genetic markers associated with celiac sprue.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that celiac disease is strongly associated with other autoimmune conditions, such as type 1 diabetes, autoimmune thyroid disease, and Sjögren's syndrome. Additionally, patients with celiac disease are at increased risk of developing certain malignancies, like T-cell lymphoma. The diagnosis often involves serological tests (e.g., tissue transglutaminase antibody, endomysial antibody) and intestinal biopsy.

## **Correct Answer:** . C. HLA DQ2 and DQ8