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
All the following are non-motile Enterobacteriaceae members except 
Select and explain. 
A. Morganella, B. Shigella, C. Klebsiella, D. Yersinia
A: Morganella
Answer: A: Morganella 
Explanation: S/K/Y (mentioned options) are non-motile Enterobacteriaceae members Ref: Textbook of Microbiology Baveja 5th ed Pg 244