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: Ophthalmology
[{'content': 'A 10 year boy present with b/l chronic uveitis. Which investigation should be ordered: \nSelect and explain. \nA. Hemogram, B. X-ray of sacroiliac joint, C. HIV rest, D. Mantoux test', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Mantoux test', 'role': 'assistant'}]