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
A 10 yr old boy presents with b/1 chronic uveitis. Which investigation should be ordered: 
Select and explain. 
A. Hemogram, B. X-ray of sacroiliac jt., C. HIV test, D. All
D: All
Answer: D: All 
Explanation: A i.e. Hemogram; B i.e. X-ray of sacroiliac jt.; C i.e. HIV test