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
[{'content': 'Organisms with characteristic "school of fish" appearance in stained smears is seen in: \nSelect and explain. \nA. Granuloma inguinale, B. Chancroid, C. Lymphogranuloma venereum, D. Herpes genitalis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Haemophilus ducreyi produce "school of fish" appearance.', 'role': 'assistant'}]