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 yr old boy presents with b/1 chronic uveitis. Which investigation should be ordered: \nSelect and explain. \nA. Hemogram, B. X-ray of sacroiliac jt., C. HIV test, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A i.e. Hemogram; B i.e. X-ray of sacroiliac jt.; C i.e. HIV test', 'role': 'assistant'}]