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
School of fish appearance is characteristic of: 
Select and explain. 
A. Bordetella peussis, B. Yersinia enterocolitica, C. Haemophillus ducreyi, D. Legionella
C: Haemophillus ducreyi
Answer: C: Haemophillus ducreyi 
Explanation: Ans. is. 'c' i. e., Haemophillus ducreyi