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: Biochemistry
Urea breath test is done in: 
Select and explain. 
A. Ketoacidosis, B. H. pylori infection, C. Kidney disease, D. Liver disease
B: H. pylori infection
Answer: B: H. pylori infection 
Explanation: The urea breath test is a rapid diagnostic procedure used to identify infections by Helicobacter pylori, a spiral bacterium implicated in gastritis, gastric ulcer, and peptic ulcer disease. 
It is based upon the ability of H. pylori to convert urea to ammonia and carbon dioxide.