This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
Urease positive organism - 
Select and explain. 
A. Proteus, B. Streptococcus, C. Vibrio cholera, D. Pseudomonas
A: Proteus
Answer: A: Proteus 
Explanation: Ans. is 'a' i.e., ProteusUrease positive bacteria* Proteus* Staph aureus* Morganella* Klebseilla* Nocardia* H. Pylori* Y. pseudotuberculosis* Y. enterocolitica* Cryptococcus (fungus)* Diphtheroids* Mycobacteria except MAC