This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
Enterobacteriaceae are A/E - rpt 
Select and explain. 
A. Pseudomonas, B. Klebsiella, C. V. Cholera, D. Proteus
A: Pseudomonas
Answer: A: Pseudomonas 
Explanation: rpt question