This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorder of Absorption, Subject name: Medicine
Which cereal is not to be given in celiac sprue? 
Select and explain. 
A. Wheat, B. Maize, C. Corn, D. Rice
A: Wheat
Answer: A: Wheat 
Explanation: Ans. (a) WheatRef.: Harrison 19th ed. /1940* Coeliac disease is caused by a reaction to gliadin found in wheat, oats, rye and Barley. Upon exposure to gliadin, there is production of anti-tissue transglutaminase antibody which cross-reacts with small-bowel tissue, causing an inflammatory reaction.* This leads to villous atrophy and leads to osmotic diarrhea.