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': 'LGV is caused by \nSelect and explain. \nA. Chalamydia trachomatis, B. Haemophylus ducrei, C. HTLV type II, D. Donovanosis granulomatis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: LGV is caused by chlamydia trachomatis, serotypes, L1, L2, L3.', 'role': 'assistant'}]