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
Causative agent of plague - 
Select and explain. 
A. Yersinia pestis, B. Yersinia enterocolitica, C. Yersinia pseudotuberculosis, D. Pasteurella septica
A: Yersinia pestis
Answer: A: Yersinia pestis 
Explanation: Ans. is 'a' i.e., Yersinia pestis o Infection caused by yersinia genus are divided intoPlague It is a deadly infectious disease caused by yersinia pestis.Vers in os isIt is characterized by infectious diarrhea, enteritis, ileitis and occasionally septicemia. It is caused by yersinia enterocolitica (most common) and yersinia pseudotuberculosis.