## **Core Concept**
Celiac sprue, also known as celiac disease, is an autoimmune disorder where the ingestion of gluten leads to damage in the small intestine. It is crucial for patients with celiac disease to follow a strict gluten-free diet. Gluten is a protein found in wheat, barley, and rye.

## **Why the Correct Answer is Right**
Rice is a gluten-free grain. Since patients with celiac sprue must avoid gluten to prevent intestinal damage and malabsorption, rice can be a safe and healthy part of their diet. Other gluten-free grains include corn, quinoa, and amaranth.

## **Why Each Wrong Option is Incorrect**
* **Option A:** Wheat contains gluten and is one of the primary grains that patients with celiac sprue must avoid.
* **Option B:** Barley also contains gluten, making it unsuitable for individuals with celiac disease.
* **Option D:** Rye is another grain that contains gluten and should be avoided by patients with celiac sprue.

## **Clinical Pearl / High-Yield Fact**
A key point for patients with celiac disease is to be aware of hidden sources of gluten in processed foods and to read labels carefully. Additionally, cross-contamination with gluten-containing grains can occur during food processing, so certified gluten-free products are often safer.

## **Correct Answer:** . Rice