Final answer:
Grilled chicken breast is the correct food choice for someone with celiac disease, as it is naturally gluten-free, unlike the other options which typically contain gluten.
Step-by-step explanation:
The correct food choice from the options provided for a patient with celiac disease is B. Grilled chicken breast. This food item is naturally free of gluten, which is the protein found in wheat, barley, rye, and sometimes oats that triggers an autoimmune reaction in people with celiac disease. This condition leads to damage to the microvilli in the small intestine, impairing nutrient absorption and causing various symptoms. Therefore, individuals with celiac disease must follow a gluten-free diet to avoid these adverse effects. Chocolate pudding, macaroni and cheese, and peanut butter and saltine crackers typically contain gluten and should be avoided unless specifically labeled as gluten-free.
Options A, C, and D are likely to contain gluten unless they are specifically formulated to be gluten-free. Chocolate pudding might have additives or thickeners derived from gluten-containing grains, macaroni is typically made from wheat, and saltine crackers are also wheat-based. Thus, these would not be safe choices for someone with celiac disease without careful inspection of the ingredients.