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: Skin
School of fish appearance is shown by: 
Select and explain. 
A. Hemophilus ducreyi, B. Gonococcus, C. Chlamydia, D. Donovania granulomatis
A: Hemophilus ducreyi
Answer: A: Hemophilus ducreyi 
Explanation: A i.e. Hemophilus ducreyi