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
All are tests used to assess the treatment response in helicobacter pylori infection, EXCEPT: 
Select and explain. 
A. Urea breath test, the, B. Stool antigen test, C. Biopsy-based tests, D. Serology
D: Serology
Answer: D: Serology 
Explanation: The urea breath test, the stool antigen test, and biopsy-based tests can all be used to assess the success of treatment Ref:Harrisons Principles of Internal Medicine, 18th Edition, Page 1221