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: Dental
[{'content': 'A 20 years old male developed multiple tender non-indurated bleeding ulcers over prepuce 4 days after sexual exposure. The most probable diagnosis in this patient is – \nSelect and explain. \nA. Primary syphilis, B. ymphogranulonia venerum, C. Chancroid, D. Donovanosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]