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': 'Painful lymphadenopathy is seen in: \nSelect and explain. \nA. Donovanosis, B. Syphilis, C. Chancroid, D. All', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Chancroid', 'role': 'assistant'}]