This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
Risk factor for carcinoma stomach include all of the following, except 
Select and explain. 
A. Blood group A, B. Atrophic Gastritis, C. Duodenal Peptic ulcer, D. Paial Gastrectomy
C: Duodenal Peptic ulcer
Answer: C: Duodenal Peptic ulcer 
Explanation: Risk factors are:Long-term ingestion of high concentration of nitratesH.pyloriIntestinal metaplasia in patients with atrophic gastritisGastric ulcers and adenomatous polypsMenetrier's diseasePatients with blood group A have a higher incidence of Ca stomach than blood group ONote: duodenal ulcers are not associated with gastric cancer.Ref: Harrison's 18/e p766