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: Microbiology
Rapid urease positive test is done in ? 
Select and explain. 
A. H. Pylori, B. S. Aureus, C. Klebsiella, D. Staphylococcus
A: H. Pylori
Answer: A: H. Pylori 
Explanation: Ans. is 'a' i.e., H. Pylori