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 organism that is strongly urease positive: 
Select and explain. 
A. Proteus species, B. Klebsiella species, C. Helicobacter pylori, D. Staphylococculs
A: Proteus species
Answer: A: Proteus species 
Explanation: Proteus species