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': "A 29 years old male with a history of long leisure trip presented with right knee pain and swollen join with foreign \nSelect and explain. \nA. Sarcoidosis, B. Tuberculosis, C. Reiter's disease, D. Bechet's disease", 'role': 'user'}, {'content': "Answer: C \nExplanation: C. i.e. Reiter's disease", 'role': 'assistant'}]