This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
The chances of a gastric carcinoma are not increased in: 
Select and explain. 
A. Pernicious anemia, B. Atrophic gastritis, C. Achlorhydria, D. Duodenal ulcer
D: Duodenal ulcer
Answer: D: Duodenal ulcer 
Explanation: None