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': "Chanroid is caused by- \nSelect and explain. \nA. Hemophilus ducrey's, B. Hemojphilus vaginalis, C. Trachoma virus, D. Treponima pallidum", 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Hemophilus ducreyi', 'role': 'assistant'}]