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
The most sensitive test for H. pylori is - 
Select and explain. 
A. breath test, B. Rapid urease test, C. Culture of biopsy, D. Microscopy of biopsy
A: breath test
Answer: A: breath test 
Explanation: None