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': 'DOC in chancroid is – \nSelect and explain. \nA. Tetracycline, B. Doxycycline, C. Erythromycin, D. Streptomycin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]