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': 'The investigations of anterior uveitis fora 25 years old boy are all except: \nSelect and explain. \nA. HLA-B27, B. X-ray sacroiliac joint, C. TORCH agent test, D. USG abdomen', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. USG abdomen', 'role': 'assistant'}]